正常成人白细胞计数中淋巴细胞的百分比是（）
A.1%～5%
B.3％～8%
C.10%～20%
D.20%～40%
E.50％～70%
参考答案：D
补全对话。
A: I'm anxious, because I 1 find my backpack.
B: Really? 2 did you drop it?
A: I think I 3 it during the concert.
B: So it 4 still be in the symphony hall. Go there to have a look. By the way, 5 are you so anxious?
A: Because I have a math test 6 algebra tomorrow.
B: Oh, terrible.
A: It's 7 that it counts 30% 8 the final exam.
B: I'm 9 to hear that.
A: 10 you have any ideas, please call me.
B: OK. I will.
证券交易所推出大宗交易制度后，承销商可以通过大宗交易的方式卖出剩余证券，拥有了一个快速、大量处理剩余证券的新途径。（）
