在丝瓜叶片结构中，含有叶绿体数目最多的结构是[ ] A．叶脉_爱下问搜题

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问题选择题

在丝瓜叶片结构中，含有叶绿体数目最多的结构是[ ]

A．叶脉

B．海绵组织

C．栅栏组织

D．保卫细胞

答案

答案：C

填空题

从方框中选择适当的词，并用其正确形式填空，其中有三项为多余选项。

see, never, hello, goodbye, nothing, anything, think, eat, only, careful, soon, some, any

        Mr Black was having trouble with his stomach, so he went to see a doctor. The doctor examined his
stomach 1 , but he couldn't find any problem. Then he said, "Well, Mr Black, take it easy. There's    2
serious. Stop smoking and then you'll be all right very    3   ."
       "But doctor," answered Mr Black, "I    4   smoke. I don't like smoking at all."
       "Oh, I    5 ." said the doctor," "then stop drinking wine from now on."
       "But I don't drink wine, either." Answered Mr Black.
       "Don't drink    6 tea or coffee then," the doctor said to him.
       "I    7 drink water," answered Mr Black, "I don't like drinking tea or coffee."
       The doctor    8   for a while and then said, "Well, what do you like to eat?"
       "Fish, I like fish very much," Mr Black answered at once. "All right, then stop    9    fish," said the doctor
as he stood up saying   10 to Mr Black.
1.                2.                  3.                  4.                  5.
6.                7.                  8.                  9.                 10.

单项选择题

作物吸收磷的形态主要是（）。

A、有机磷；

B、难溶性磷；

C、无机磷；

D、枸溶性磷。