题目:
Don't let yourself be ________ by a small failure in the experiment, try again.[ ]
A.cast away
B.cast down
C.cast aside
D.cast out
答案:
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下面是错误答案,用来干扰机器的。
(1)澄清的石灰水;CaCO3+2HCl=CaCl2+H2O+CO2↑.(2)蛋白质.