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单选题
If you swim in a river or lake, be sure to investigate________is below the water surface. Often there are rocks or branches hidden in the water.
A
what
B
who
C
that
D
whoever
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更多 “单选题If you swim in a river or lake, be sure to investigate________is below the water surface. Often there are rocks or branches hidden in the water.A whatB whoC thatD whoever” 相关考题
考题
A） 信息归纳（共5小题，每小题1分）阅读下面短文，完成信息卡：Skin-diving is a new sport today. This sport takes you into a wonderful new world. It is like a visit to the moon. When you are under water, it is easy for you to climb big rocks, because you are no longer heavy.Here, under water, everything is blue and green. During the day, there is plenty of light. When fish swim nearby, you can catch them with your hands.When you have tanks of air on your back, you can stay in deep water for a long time. But you must be careful when you dive in deep water.To catch fish is one of the most interesting parts of this sport. Besides, there are more uses for skin-diving. You can clean ships without taking them out of water. You can get many things from the deep sea.Now you see that skin-diving is both useful and interesting.In formation CardA new sport today81.___________
考题
() the old man's sons wanted to know was () the gold had been hidden.
A.That ... whatB.What ... whereC.What ... thatD.That ... where
考题
() the gab is turned off and the door is locked before you leave home.
A、It’s sure thatB、Make sure thatC、Certain thatD、I certain that
考题
His favorite saying was “Do not do to others _______ you would not have them to do to you.
A.whatB.whoC.whichD.that
考题
Themerefact_________mostpeoplebelievenuclearwarwouldbemadnessdoesnotmeanthatitwillnotoccur.A)whatB)whichC)thatD)why
考题
Uranus, ________ is much more massive than the Earth, seems to have been tipped over so that it lies on its side.A.what
B.who
C.that
D.winch
考题
—How about_in the river with us?
—Sorry,I can’t.My parents often tell me_that.
A.swim；don’t do
B.swim；to do
C.swimming；not do
D.swimming；not to do
考题
I cannot think of anything ______ happened that day which I would have wished otherwise.A.what
B.who
C.that
D.which
考题
— Are you sure about that? —（）A、You needn’t worry about thatB、I like the idea.C、Oh, no. I’m afraid of thatD、Oh, yes. I’m absolutely positive
考题
_____ our representative calls on you next week, he will make you an offer ____ we feel sure will meet with your approval.A、When, whichB、Who, whichC、When, with thatD、Who, with that
考题
单选题Since 1960, the fast-growing town of Hotstone, Arizona, has drawn water from the Gray River, which feeds Lake Mudfish. If the town’s water use continues to grow at its present rate, in about 20 years the water level of Lake Mudfish will inevitably decrease to the point that it can no longer support its biologically fragile population of fish. The prediction above is based on which of the following assumptions?A
As the town’s water requirements grow, it will not be able to meet those requirements by drawing on water sources other than the Gray River.B
Since 1960, the lake’s population of fish has become more biologically fragile.C
The amount of water that the lake loses to evaporation each year will increase over the next two decades.D
There are multiple sources of water besides the Gray River that feed into Lake Mudfish.E
The town of Hotstone will be able to reverse its trend of increasing water use if it implements an aggressive water conservation program.
考题
单选题As you approach Shreves cut-off you see Red River LandingGage (302.4 AHP) which reads 4.2 feet. Which of thefollowing statements is TRUE? （）A
This reading is at the same elevation as the 6.2 ft. mark on the gage at Head of PassesB
A vessel drawing 8 ft would be able to pass over the sill at Old River LockC
This reading is 6.4 feet below the Low Water Reference PlaneD
A vessel drawing 7 ft. would be able to pass through the locks at Lower Old River
考题
单选题请阅读 Passage 1，完成第 21~25小题。Passage 1These days，many large city buildings are equipped with their own air-conditioning systems.These systems help keep the buildings cool，but they can also damage the environment.Since they use a lot of electricity，for instance，they contribute indirectly to global warming.In addition，the water that flows through the systems is often cooled using chemicals called chlorofluorocarbons，or CFCs，that are believed to damage the Earth's ozone layer.Recently，though，a system has been built in the city of Toronto，Canada，that cools buildings with little damage to the environment. In the traditional air-conditioning systems found in most large buildings，water is pumped through the building in a continuous cycle.The water is first cooled to a temperature of 4℃ in machines called chillers.It is then sent to individual units that cool the air in each room.As the water flows through the building，it gradually becomes warmer.Finally，it reaches the roof ，where it is left to cool down naturally in a water tower.After that it is returned to the chillers，where the cycle begins again.Toronto lies on the shore of Lake Ontario，one of North America's Great Lakes，and the new system makes use of cold water taken from about 80 meters below the surface of the lake.At this depth，the water in the lake remains at 4℃ all year round.This is exactly the temperature to which the water in air-conditioning systems is cooled.However，the water from the lake is not pumped directly into the air-conditioning systems.Instead，it is used to cool the water that is already inside the air-conditioning systems.After that，the lake water is added to the city's ordinary water supply.Enwave，the company that developed this deep-lake cooling system，says that it uses 75 percent less energy than traditional air conditioning.And since no CFCs are used，no damage can be caused to the ozone layer.Not every city is located next to a large lake，but experts believe that systems like the one being used in Toronto could be built elsewhere by using other natural sources of cold water.What happens in the end to the water from Lake Ontario?A
It is used by the residents of Toronto.B
It is returned to a place deep in the lake.C
It is cooled down before being used again.D
It is added to the water inside air-conditioning systems.
考题
单选题For the deepest water when rounding a bend in a river，you should navigate your vessel（）.A
toward the inside of the bendB
toward the outside of the bendC
toward the center of the river just before the bend，then change course for the river's center after the bendD
in the river's center
考题
单选题Which of the following is the best version of the underlined portions of sentences 10 and 11 (reproduced below)?For instance, one candidate might want to eliminate environmental regulations so his industrial supporters can get richer. But you have asthma that is affected by the pollution or you'd rather not swim in a lake that has become polluted because of it.A
(as it is now)B
for the financial benefit of his industrial supporters, but to the detriment of your asthma and your favorite swimming lake, which are harmed by pollution.C
for his industrial supporters' wealth, but you have asthma and your favorite swim- ming lake is getting worse because of pollution.D
for his industrial supporters' wealth, but not for your asthma and your favorite swimming lake is harmed by pollution.E
for the financial benefit of his industrial supporters, but to the detriment of your asthma and your favorite swimming lake are harmed by pollution.
考题
单选题请阅读 Passage 1，完成第 21~25小题。Passage 1These days，many large city buildings are equipped with their own air-conditioning systems.These systems help keep the buildings cool，but they can also damage the environment.Since they use a lot of electricity，for instance，they contribute indirectly to global warming.In addition，the water that flows through the systems is often cooled using chemicals called chlorofluorocarbons，or CFCs，that are believed to damage the Earth's ozone layer.Recently，though，a system has been built in the city of Toronto，Canada，that cools buildings with little damage to the environment. In the traditional air-conditioning systems found in most large buildings，water is pumped through the building in a continuous cycle.The water is first cooled to a temperature of 4℃ in machines called chillers.It is then sent to individual units that cool the air in each room.As the water flows through the building，it gradually becomes warmer.Finally，it reaches the roof ，where it is left to cool down naturally in a water tower.After that it is returned to the chillers，where the cycle begins again.Toronto lies on the shore of Lake Ontario，one of North America's Great Lakes，and the new system makes use of cold water taken from about 80 meters below the surface of the lake.At this depth，the water in the lake remains at 4℃ all year round.This is exactly the temperature to which the water in air-conditioning systems is cooled.However，the water from the lake is not pumped directly into the air-conditioning systems.Instead，it is used to cool the water that is already inside the air-conditioning systems.After that，the lake water is added to the city's ordinary water supply.Enwave，the company that developed this deep-lake cooling system，says that it uses 75 percent less energy than traditional air conditioning.And since no CFCs are used，no damage can be caused to the ozone layer.Not every city is located next to a large lake，but experts believe that systems like the one being used in Toronto could be built elsewhere by using other natural sources of cold water.What is one problem with traditional air-conditioning systems?A
The chemicals they use sometimes pollute the water supply.B
They often damage the buildings that they are trying to cool.C
There are not enough CFCs in the world to cool all the buildings.D
The method they use to cool water is thought to harm the ozone layer.
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