有时我们会看到这样的现象：路旁杨树茎的某一部分受到创伤露出了

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问题选择题

有时我们会看到这样的现象：路旁杨树茎的某一部分受到创伤露出了木质部，这部分茎就不能增粗．这是因为，被破坏的结构包括（　　）

A．韧皮部

B．形成层

C．木质部

D．树皮

答案

答案：B

填空题

根据句意、首字母提示或汉语意思完成单词。

1. I'd like to go to the jungle because I like t________vacatlons.

2. Shanghai is cold this time of year. People need to be p________with warm clothes there.

3. Some people would not like to do the same things every day and will get b ________.

4. That boy insisted that he had a________(特别的)reason for making this mistake

5. Would you please give us some________(建议) for our English study?

填空题

一般而言，新系统对当前（）影响较大。