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【单选题】
生理盐水(9g/L NaCl,M=58.44g/mol)的物质的量浓度为()mol·L -1
A.
0.0154
B.
0.154
C.
1.54
D.
308
E.
15.4
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【多选题】实现中华民族伟大复兴,就是中华民族近代以来最伟大的梦想。这个梦想,凝聚了几代中国人的夙愿,体现了中华民族和中国人民的整体利益,是每一个中华儿女的共同期盼。实现中国梦必须
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【判断题】车身的钢板越厚，汽车的安全性越好
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half a glass of water is better than nothing
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