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【单选题】
在大气湿度大时，发育中的果实常会缺钙，主要原因是 [ ]A.
大气湿度大时，蒸腾作用弱，影响钙的吸收
B.
大气湿度大时，呼吸作用弱，影响钙的吸收
C.
大气湿度大时，蒸腾作用弱，影响钙的运输
D.
大气湿度大时，蒸腾作用强，影响钙的运输
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【单选题】关于大气污染源，下列说法正确的是( )。
A.
按污染物的排放形式可分为连续源、瞬时源、间歇源
B.
面源包括无组织排放源和数量多、源强源高都不大的点源
C.
凡不通过排气筒或通过25cm高度以下排气筒的排放，均属无组织排放
D.
按污染源的几何高度可分为电源、面源和线源
【多选题】下列说法不正确的是
A.
流动功的大小取决于系统的进口和出口状态，而与经历的过程无关
B.
理想气体任意两个状态参数确定后，气体的状态就一定确定了
C.
理想气体经历一可逆定温过程，由于温度不变，则工质不可能与外界交换热量
D.
只适用于理想气体，与过程是否可逆无关
【单选题】Under U.S. commercial policy, the escape clause results in
A.
temporary quotas granted to firms injured by import competition.
B.
tariffs that offset export subsidies granted to foreign producers.
C.
a refusal of the U.S. to extradite anyone who escaped political oppression.
D.
tax advantages extended to minority-owned exporting firms.
E.
tariff advantages extended to certain Caribbean countries in the U.S. market.
【简答题】I have known how to serve the customers better after the training.
【单选题】Under a system of floating exchange rates, a U.S. trade deficit with Japan will cause:
A.
A flow of gold from the United States to Japan
B.
The U.S. government to ration yen to U.S. importers
C.
An increase in the dollar price of yen
D.
A decrease in the dollar price of yen
【单选题】城市污染源指城市内产生污染物的设备、装置、场所和单位，下列不属于根据排放方式来划分的是（）。
A.
脉冲式污染源
B.
持续式污染源
C.
点源和面源
D.
固定性污染源
【单选题】听力原文： Under growing international pressure, U.S. authorities Tuesday seized a Cuban exile accused by Fidel Castro's government of masterminding a 1976 airliner bombing that killed 73 people. He had be...
A.
because he had killed 73 Cuban 'civilians in 1976
B.
because he had planned an airliner bombing in 1976
C.
because he had worked as a spy on Cuba' s behalf
D.
because of his illegal immigration status
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