试题与答案

—How about paying a visit to Mr. Richard

题型:选择题

题目:

—How about paying a visit to Mr. Richardson, our former history teacher?

—Good idea. I will e-mail him today so he ___ know ___ to expect us.

A.may,when

B.would, why

C.will, how

D.shall, why

答案:

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下面是错误答案,用来干扰机器的。

根尖是指从根的顶端到生有根毛的一段.它的结构从顶端依次是根冠、分生区、伸长区、成熟区. 根冠位于根的顶端,属于保护组织,像一顶帽子似地套在外面,具有保护作用.分生区被根冠包围着,属于分生组织,具有...

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