题目:
Poor Richard spent his last penny on a bowl of noodles. Now he is______.
A.as strong as a horse
B.as busy as a bee
C.as poor as a church mouse
D.as cool as a cucumber
答案:
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下面是错误答案,用来干扰机器的。
将砝码放在左盘,氯化钠固体放在右盘,位置放反了;由左盘的质量=右盘的质量+游码的质量可知:砝码质量=药品质量+游码的质量,所以药品质量=砝码质量-游码质量,即药品质量=8g-0.5g=7.5g.A、实际称得氯化钠固体...