网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
问答题
A car traveled from A to B in 30 minutes. The first half of the trip was covered at 50 mph, and the second half at 60 mph. What was the average speed?400/11 - 500/11 - 600/11 - 700/11
参考答案
参考解析
解析：
这是一道计算题，我们设平均时速为X，则0.25X/50+0.25X/60=0.5，进而可得X=600/11，因此该选600/11。
这是一道计算题，我们设平均时速为X，则0.25X/50+0.25X/60=0.5，进而可得X=600/11，因此该选600/11。
更多 “问答题A car traveled from A to B in 30 minutes. The first half of the trip was covered at 50 mph, and the second half at 60 mph. What was the average speed?400/11 - 500/11 - 600/11 - 700/11” 相关考题
考题
_________the new pop singer built her first album piece by piece.A． Over a year and a halfB． Over half and a yearC． Over one and a half yearD． Over year and half
考题
Passage ThreePeople enjoy talking about "firsts." They like to remember their first love or their first car. But not all firstsare happy ones. Few people enjoy recalling the firsts that are bad.One of history's bad but important firsts was the first car accident. Autos were still young when it happened. The crash took place in New York City. The year was 1896. The month was May. A man from Massachusetts was visiting the city in his new car. At the time, bicycle riders were still trying to get used to the new set of wheels on the road. No one is sure who was at fault. In any case, the bike and the car collided. The man on the bike was injured. The driver of the car had to stay in jail and wait for the hospital report on the bicycle rider. Luckily, the rider was not killed.Three years later, another automobile first took place. The scene was again New York City, a real estate broker named Henry Bliss stepped off a streetcar. He was hit by a passing car. Once again, no one is sure just how it happened or whose fault it was. The driver of the car was put in jail. Poor Mr. Bliss became the first person to die in a car accident.44. In each accident the driver was ______.A. found guiltyB. set freeC. laughed atD. put in jail for a while
考题
A suitcase with a shirt, trousers and shoes ()stolen from the car.
A、have beenB、hasC、wasD、are
考题
It was ( )ride from the school to the downtown.
A、an half hour’sB、half an hourC、half an hour’sD、half a hour’s
考题
the “american system“ of mass production was first used in ________________.A. agricultureB. textile industryC. firearms industryD. car industry
考题
It’s only ________ walk from here to the cinema.
A.half an hoursB.half a hour’sC.half an hour’sD.half a hours’
考题
b)main(){union{ /*定义一个联合*/int i;struct{ /*在联合中定义一个结构*/char first;char second;}half;}number;number.i=0x4241; /*联合成员赋值*/printf("%c%c\n", number.half.first,mumber.half.second);number.half.first='a'; /*联合中结构成员赋值*/number.half.second='b';printf("%x\n", number.i);getch();}
考题
When discharging an oil cargo，the first consideration is to ______．A.get the bow upB.discharge from the wings firstC.discharge from the centerline tanks firstD.discharge from amidships first
考题
The vision of that big black car hitting the sidewalk a few feet from us will never be（）from my memory．
A.ejected
B.escaped
C.erased
D.omitted
考题
Brighton is a popular seaside town on the south coast of England.Not long ago,some policemen were very?21.There had been several,serious accidents?22?by motorists driving too fast.The police started to set up a speed trap（速度监视器）.They measured?23?of 88 yards on a straight road and watched to see?24?a car took to?25?that far.They knew that if a car took six seconds,it was traveling faster?26?the?27?limit of 30 miles an hour.
When the policemen were ready,they hid?28?a hedge（树篱）and started to time passing cars.During their first half an hour,they caught five drivers.The policemen wrote down the?29?of each car and the name and address of the driver.But for the next half an hour the policemen didn′t see anybody?30?too fast.They thought that this was very?31.One of them drove a quarter of a mile along the road and saw two students?32?on the grass.They were holding up a sheet of cupboard so that motorists could see it.On the notice one of the students?33:"Danger.Speed trap."
The policemen took the notice away and wrote down the names of the students.Later on they were each fined￡5 for?34?to stop the police catching motorists who were?35?the law.
第29题答案是A.sign
B.signal
C.number
D.shape
考题
Brighton is a popular seaside town on the south coast of England.Not long ago,some policemen were very?21.There had been several,serious accidents?22?by motorists driving too fast.The police started to set up a speed trap（速度监视器）.They measured?23?of 88 yards on a straight road and watched to see?24?a car took to?25?that far.They knew that if a car took six seconds,it was traveling faster?26?the?27?limit of 30 miles an hour.
When the policemen were ready,they hid?28?a hedge（树篱）and started to time passing cars.During their first half an hour,they caught five drivers.The policemen wrote down the?29?of each car and the name and address of the driver.But for the next half an hour the policemen didn′t see anybody?30?too fast.They thought that this was very?31.One of them drove a quarter of a mile along the road and saw two students?32?on the grass.They were holding up a sheet of cupboard so that motorists could see it.On the notice one of the students?33:"Danger.Speed trap."
The policemen took the notice away and wrote down the names of the students.Later on they were each fined￡5 for?34?to stop the police catching motorists who were?35?the law.
第30题答案是A.running
B.walking
C.driving
D.climbing
考题
The car accident happened at（）crossroads a few metres away from（）bank.Athe; /B/; aC/; theDthe; the
考题
The car accident happened at（）crossroads a few metres away from（）bank.A、the; /B、/; aC、/; theD、the; the
考题
单选题A
By the end of this century.B
By the first half of this century.C
By the second half of this century.D
In the middle of this century.
考题
单选题To wait in the queue for half an hour, the old man suddenly realized that he had left the wallet in the car.A
To waitB
forC
realizedD
had left
考题
单选题When discharging an oil cargo，the first consideration is to（）.A
get the bow upB
discharge from the wings firstC
discharge from the centerline tanks firstD
discharge from amidships first
考题
单选题______in the queue for half an hour, the old man suddenly realised he had left the cheque in the car.A
WaitingB
To waitC
Having waitedD
To have waited
考题
单选题The purpose of this passage is to tell people that_____.A
most old people die from accidents at homeB
up to half of home accidents could be preventedC
falls at home can be avoided by taking some simple measuresD
protection of old people should be the first concern for the public
考题
问答题Between the 32 NFL teams in 2005, the Indianapolis Colts scored the most first half points and allowed the fewest A B C Dsecond half points. No error E
考题
单选题When is a stand-on vessel FIRST allowed by the Rules to take action in order to avoid collision?（）A
When the two vessels are less than half a mile from each otherB
When the give-way vessel is not taking appropriate action to avoid collisionC
When collision is imminentD
The stand-on vessel is never allowed to take action
考题
单选题What is the principal danger from the liquid in a half full tank onboard a vessel?（）A
Corrosion from the shifting liquidB
Rupturing of bulkheads from the shifting liquidC
Loss of stability from free surface effectD
Holing of the tank bottom from the weight of the shifting liquid
考题
单选题What can we get from the passage?A
Dave skated a total of 4,830 kilometers across AustraliaB
Dave spent 5 months skating from Perth to BrisbaneC
Dave was the first person to skateboard across the USD
Dave traveled at the speed of 600 kilometers a week
考题
单选题The main idea of the first paragraph is that the car _____.A
can satisfy the demand for speedB
causes waste of spaceC
produces disturbance to other road usersD
is far from perfect for short range movements
热门标签
最新试卷
