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【单选题】
装运散装谷物的船舶在目的港卸货前应______后,方可开始卸货。A.
检验舱内含氧量
B.
测定舱内空档高度
C.
对货物进行熏舱
D.
在检验人员确认所运谷物质量没有问题
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举一反三
【单选题】有一电阻、电感和电容串联电路，R=600Ω，L=1.911亨，C=5.308μF，电路电压U=220V、ｆ＝50Hz,该电路的电流为。
A.
0.25A
B.
0.3A
C.
0.37A
D.
0.45A
【单选题】It is said that sixty percent of all energy ________ in the world today is being lost as wasted heat.
A.
produced
B.
producing
C.
to produce
D.
having produced
【单选题】Over time, my remaining hearing dropped to 20 percent, where it is today.
A.
Gradually I lost more of my hearing until I was 80 percent deaf, as I currently remain.
B.
Soon I lost 20 percent of my hearing after I moved to where I’m living today.
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