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问题 单项选择题

下列有关（路径查找器）的描述不正确的是（）

A.（路径查找器）命令执行后产生的路径可能是复合路径

B.对于包含有渐变网格的物体不能执行（路径查找器）命令

C.所谓（路径查找器）就是用来寻找已经绘制的各种性质的路径

D.在（路径查找器）的命令中可以对对象进行（合并）操作

答案

参考答案：C

翻译题

完成句子。

1.We are kept ______(得知)what is happening in the world by reading newspapers.(inform)

2. I will have to stay inside unless (停止下雨) tomorrow. (stop)

3. _____(一旦公之于众)in the newspaper, the incident will attract lots of people's attention. (expose)

4. Mike _______(不可能在听)the lecture now, for I saw him playing basketball on the playground

    a minute ago. (listen)

5. If you don't go to the concert, ________(我也不去). (neither)

6. Mary is the only one of my good friends ________(愿意帮助我), no matter what difficulty I

    may meet. (willing)

7. _______(我们应该牢记)is that practice makes perfect. (keep)

8. Since all the tickets ________(已售完)when we got there, we had to go again the next day. (sell)

9. Jane happened ________(在购物)in the supermarket when I called her to have dinner with us. (do)

10. Only after participating in the speech contest ________(Tom变得更自信)and had more

      experience. (become)
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多项选择题

关于声压和声压级的正确描述是（）。

A.声压的大小取决于声源与大气压无关

B.一般仪器测得的是有效声压

C.声压级（dB.=20×log（P/Po）（Po为20μPA.

D.声压随时间作周期性的变化

E.声压级是用对数表示的声压值
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