矿井通风是借助于()压力驱动空气流动,供给井下通风空间足够的风量。
A、主通风机
B、自然压力
C、局部通风机
参考答案:A
能够迅速捕获和处理抗原的细胞主要是()
A.巨噬细胞浆细胞淋巴细胞
B.淋巴细胞树突状细胞单核巨噬细胞
C.T细胞B细胞朗罕氏细胞
D.尘细胞中性粒细胞K细胞
E.巨噬细胞树突状细胞朗罕氏细胞
根据上下文补全对话。
A: Good morning, Jack.
B: Good morning, Doctor.
A: What is wrong 1 you?
B: I 2 a sore throat. And I cough a lot.
A: Oh, I am 3 to hear that.
B: And l can't sleep well.
A: Please 4 your mouth, and say "ah".
B: Ah…
A: Oh, you have a cold, but there is nothing 5 .You 6 stay in bed 7 a few days and have a good rest.
B: Should I 8 some medicine, Doctor?
A: Yes, of course. Take this medicine three 9 a day, and 10 a lot of water.
B: Thank you very much.
A:You are welcome.
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