新闻采编与制作专业专升本需要考什么科目？

求函数f(x，y)=e2x(x+y2+2y)的极值.?

The destruction of habitats(栖息地)all over the world is the primary reason species are?becoming extinct(灭绝)or endangered．Houses,highways,dams,industrial buildings,and?ever-spreading farms now dominate?21?formerly occupied by forests,deserts,and wetlands．22?the beginning of European settlement in America,23,
over 65,000,000 acres of?wetlands have been drained．One million acres alone vanished
24?1985 and 1995．
Habitat destruction can be?25?or it can be subtle,occurring over a
26?period of time?without being noticed．27?such as sewage from cities and chemical runoff fromfarms,can change?the?28?and quantity of water in streams and rivers．To?29?living in a delicately balanced?habitat,this disturbance can be as
30?as the clear-cutting of a rainforest．
31?remaining habitats are carved into smaller and smaller pockets or islands,remaining?species are forced to exist in these?32?areas,which causes further habitat?33?These?species become less adaptable to environmental?34；in fact,they become?35?endangered．Scientists believe that when a habitat is cut by 90%,one-half of its plants,animals and insects will?become extinct．
第28题的答案是（ ）

A.Amount
B.purity
C.nature
D.quality

请在第_____处填上正确答案。

阅读《李将军列传》中的一段文字，回答问题：
程不识故与李广俱以边太守将军屯。及出击胡，而广行无部伍行阵，就善水草屯，舍止，人人自便，不击刁斗以自卫，莫府省约文书籍事，然亦远斥候，未尝遇害。程不识正部曲行伍营阵，击刁斗，士吏治军簿至明，军不得休息，然亦未尝遇害。不识曰：“李广军极简易，然虏卒犯之，无以禁也，而其士卒亦佚乐，咸乐为之死。我军虽烦扰，然虏亦不得犯我。”是时汉边郡李广、程不识皆为名将，然匈奴畏李广之略，士卒亦多乐从李广而苦程不识。程不识孝景时以数直谏为太中大夫。为人廉，谨于文法。
（1）将这段文字中的下列句子译成现代汉语。
士卒亦多乐从李广而苦程不识：
为人廉，谨于文法：
（2）这段文字表现了李广怎样的个性特征
（3）这段文字里主要运用了哪些方法刻画李广