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【单选题】
玉米(玉蜀黍)的食用部分是A.
种子
B.
胚乳
C.
果实(颖果)
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】听力原文：M: If I were you, I would travel by plane instead of by bus. It will save your precious time. M: But flying always makes me so nervous. Q: What does the man mean? (17)
A.
He prefers taking a plane because the bus is too slow.
B.
He prefers taking a bus because the plane makes him nervous.
C.
He prefers staying at home to traveling by plane.
D.
He prefers traveling with the woman.
【单选题】听力原文：W: You never speak English unless you absolutely have to. I'll help you if you promise to speak nothing but English all the time. M: All right. Maybe I'll do that. It's the only way I'll be able ...
A.
The man speaks English all the time.
B.
The man is trying to improve his spoken English.
C.
The woman is teaching the man how to write in English.
D.
The woman will never speak English unless she absolutely has to.
【单选题】关于胃排空的说法,不恰当的是
A.
混合性食物在进餐后4~6小时完全排空
B.
胃的蠕动是胃排空的动力
C.
液体食物排空速度快于固体食物
D.
糖类食物排空最快,蛋白质最慢
E.
迷走神经兴奋促进胃排空
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