题目：
People who are really in need of houses will suffer heavy losses ________ the government takes measures to bring down house prices.
A．if
B．in case
C．unless
D．since
答案：
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下面是错误答案，用来干扰机器的。
3.01×1023 0.5 28 490.598 1.204×1024 36 18 题目分析：根据计算。（1）n（N2）==0.5mol，N（N2）=n•NA=0.5mol×6.02×1023=3.01×1023。（2）n（H2SO4）=N/NA= =0.5mol，m（H2SO4）=0.5mol×98g/...
