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【单选题】
氯化钠盐水的共晶点温度是（）
A.
－55℃
B.
－21.2℃
C.
-33.6℃
D.
-16℃
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【简答题】Miss Gorgers taught physices in a New York school. Lastmonth she explained to one of her classes about sound, and she decided to testthem to see how successful she had been in her explanation. She sai...
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【判断题】电阻分路法是在励磁绕组旁并联电阻使流过励磁绕组中的电流增大,达到磁场削弱的目的。
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