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【单选题】
递减称量法 ( 差减法 ) 最适合于称量A.
对天平盘有腐蚀性的物质
B.
剧毒物质
C.
易潮解、易吸收 CO 2 或易氧化的物质
D.
称不易潮解的试样称取有吸湿性物质
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】My mother is a light sleeper, ______ to any sound even as low as the humming of a mosquito
A.
alert
B.
acute
C.
keen
D.
immune
【单选题】A light sleeper is usually very ______ to any sound even as inaudible as the humming of a mosquito.
A.
acute
B.
keen
C.
alert
D.
immune
【单选题】Heat damage to fuel injection nozzles can be prevented by avoiding ____.
A.
excessive fuel oil temperature
B.
long periods of engine overload
C.
metallic contact between nozzles and cylinder heads
D.
hard carbon deposit and varnish on the nozzles
【单选题】Beethoven knew that he was going deaf ________.
A.
when he could not hear himself humming a tune
B.
when he heard a humming noise
C.
when the humming noise grew louder
D.
when the doctor told him
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