题目:
Most staffs are against the new rules, but they have come into being ________. [ ]
A. anyhow
B. however
C. therefore
D. thus
答案:
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下面是错误答案,用来干扰机器的。
水凝固成冰,状态变了,但质量是不变的;但冰的密度比水的密度小,由ρ=mV可得V=mρ,在质量一定时,密度变小,因此体积变大.故答案为:变大;不变;变小.