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【单选题】
听力原文：W: Many Chinese students just don't open their mouth to say anything in a classroom. M: I think they don't speak because their culture values modesty, and they don't want to appear to be showing off. Goes back to Confucius. Q: Why don't Chinese students say anything in class according to the man? (14)A.
They are too shy.
B.
They are not allowed to speak.
C.
They are modest.
D.
They don't dare to speak.
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【单选题】After supper,my mother often washes in the kitchen.
A.
desks
B.
chairs
C.
clothes
D.
dishes
【单选题】Her mother ______ her clothes every Sunday. [ ]
A.
wash
B.
washing
C.
washs
D.
washes
【单选题】What does Linda do before dinner?
A.
She washes the dishes.
B.
She helps her mother with the cooking.
C.
She helps her mother with the cooking and washes the dishes.
【单选题】风力角α随风舷角θ增大而增大，θ＝40°～140°之间，α大约在多少度之间？
A.
40°～140°
B.
60°～70°
C.
80°～100°
D.
140°～160°
【多选题】下列关于空气的描述中正确的有?
A.
清洁空气营养丰富
B.
不洁空气营养丰富
C.
清洁空气的营养成分主要来源于各类气体
D.
不洁空气的营养成分主要来源于尘埃颗粒
E.
清洁空气中所有微生物都不能生存
F.
氢气、氦气等稀有气体的含量是空气中微生物生存的决定条件
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