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听力原文：M: What do you think? Should I accept this exchange program and head off to Japan for three months? W: Are you serious? Everyone I know is lining up to go there and you' re actually considering not going? Q: What does the woman imply? (13)A.
The opportunity is too rare to pass over.
B.
He should line up for the program as others do.
C.
He should concentrate on his studies.
D.
He should consider going together with others.
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【单选题】一般情况下，显影液温度升高12℃显影速度呈现怎样情况。( )一般情况下温度升高12℃，显影速度约加快1倍。如果显影温度过低，显影速度慢，以至难以完成显影。因此如显影1分钟，显影温度宜控制在手显22±2℃、机显24±2℃。
A.
显影速度加快0.5倍
B.
显影速度加快1倍
C.
显影速度加快2倍
D.
显影速度慢0.5倍
【单选题】What is Kelley's main purpose of writing the letters?
A.
To educate his students.
B.
To have pictures for his office wall.
C.
To improve his students' letter writing skills.
D.
To help his students know more about the celebrities.
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【单选题】正常人血氨浓度不会超过0.1mg/100ml，这是因为( )
A.
氨在一般情况下会转化成葡萄糖
B.
氨在一般情况下会转化成丙酮酸
C.
氨在血液中以丙氨酸和谷氨酰胺的无毒形式存在
D.
氨在血液中以丙氨酸和谷氨酸的无毒形式存在
E.
以上都不对
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