正确答案: B

草原

题目：下列植被类型中不仅是世界陆地生态系统的主要类型，而且也是人类重要的畜牧业基地的是( )

解析：B

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举一反三的答案和解析：

[单选题]Passage ThreeShopping for clothes is not the same experience for a man as it is for a woman. A man goes shopping because he needs something.

he does not mind how much he has to pay for the right things

解析：

    44．答案为C  此考题为细节题。根据第1段第4句tie knows what he wants and he just finds it and buys it，but cares little about the price，就可以断定C正确。

[单选题]Why could many looters run away?

There were not enough policemen to catch them all.

解析：

33．答案为D  根据第二段The number of policeman available was far from enough...可知警察人数远远少于抢劫者，使抢劫者能够逃脱。

[单选题]第 20 题 邓小平理论形成的社会实践基础是（　　）

改革开放和社会主义现代化建设

[单选题]班主任的工作重点和经常性工作是( )

对学生进行品德教育

[单选题]《苦恼》中平静地听完了车夫姚纳痛苦诉说的是( )

小母马

解析：【答案】A

[单选题]Evidently, most artists and writers require ______.

inspiration

解析：54．第三段前半部分。作者用实例证明许多著名的作家和艺术家都需要灵感。选项 A是正确的。

[单选题]对心力衰竭患者进行择期手术，最好待心力衰竭控制( )

3～4周以后