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问题 单项选择题

白细胞稀释液不能破坏哪一种红细胞（）

A.正常红细胞

B.畸形红细胞

C.网织红细胞

D.有核红细胞

E.棘形红细胞

答案

参考答案：D

单项选择题

The CPU does not have to look (66) all of RAM to find the spot it needs. But RAM only (67) the data temporarily. As soon as you switch the computer (68) , all that information disappears from the RAM. When you switch the computer on again, the RAM is (69) , and ready (70) a new program and new data.

（70）处填（）。

A．receive

B．be received

C．receiving

D．received
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单项选择题

鱼类体内的危害因素如重金属、环境持续化合物等，它们的分布是有一定规律的（）。

A.肉食性鱼>杂食性鱼>草食性鱼

B.草食性鱼>杂食性鱼>肉食性鱼

C.杂食性鱼>肉食性鱼>草食性鱼

D.杂食性鱼>草食性鱼>肉食性鱼
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