单项选择题

听力原文：Where should I put the shipment of machine parts that just arrived?
(A) No, they haven't arrived.
(B) It arrived at 3: 00 in the morning.
(C) In the storeroom on the first floor.
(31)
A．
B．
C．

A.
(31)
A．

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对热、酸和碱稳定，但易被氧化破坏的维生素包括（）。

A.维生素A和维生素D
B.维生素C和B2
C.尼克酸和维生素E
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听力原文：Are there more volleyballs in the cabinet?
(A) Yes, I have just got some.
(B) We still have a vollyball match to play on Friday.
(C) No, they didn't do anything in the cabin.
(32)
A．
B．
C．