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问题 选择题

下列有关生物进化的论述中，不符合达尔文进化学说基本观点的是[ ]

A．遗传和变异是自然选择发生作用的基础

B．生物的变异是不定向的，自然选择是定向的

C．变异经过长期的自然选择和积累，就可能产生出生物的新类型

D．环境改变使生物产生定向变异，以适应变化的环境

答案

答案：D

填空题

单词拼写。

1. For him, this will be an e____ new job, so he isn't sure of it.

2. The windows haven't been cleaned for at least a year and are d____ now.

3. I tried to tell her but she ____ (不理睬) me

4. I'm rather ____ (挂念) about my brother's health.

5. Milk is the ____ (自然) food for young babies. 6 Forces are ____ (蕴藏) in the masses.

7. He went to town with the ____ (目的) of buying a new television.

8. We are asked to learn about some ____ (交际) skills in this unit.

9. Since the weather is so fine, let's go o____.

10. They come from Germany. They are G____.

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单项选择题

滑模施工的特点有( )。

A．占用施工场地大

B．高空作业少

C．节约大量模板

D．耗钢量少
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