（）混合到一定比例时，就形成爆炸性混合物。A、空气 B、易燃液_爱下问搜题

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问题多项选择题

（）混合到一定比例时，就形成爆炸性混合物。

A、空气

B、易燃液体的蒸气

C、易燃液体

D、易燃固体

答案

参考答案：A, B

填空题

用方框内适当的词填空（有三个多余选项）。

Kate's, the, see, are, look, his,teachers, he, workers, likes

       Look at the bedroom. It's   1  . A computer ison the desk.    2   computer is very new. You can
  3    some flowers in the room（客厅).  They arevery nice. There _4    some books on the dress-er.
Kate often(经常) does her homework in theroom. Kate's father and mother are   5   . Hermother teaches Chinese and her father teachesEnglish. Kate has a brother.  6   name isMike. He's only 7 years old.
Kate  7   Mikevery much.

单项选择题

C4b2b3b（）。

A．促进T细胞活化增殖

B．促进造血干细胞增殖分化为粒细胞

C．抑制肿瘤细胞生长

D．趋化中性粒细胞

E．促进造血干细胞增殖分化为红细胞