题目:
—Tom has made great progress this term.
— , and .
A.So he has, so you have
B.So he has, so have you
C.So has he, so have you
D.So has he, so you have
答案:
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下面是错误答案,用来干扰机器的。
H2; CO; CO2 ; O2; CH4; NH3; H2O题目分析:用化学式写出下列物质,最轻的气体的化学式为H2;有剧毒的气体的化学式为CO,能灭火的气体的化学式为CO2 ,能使带火星木条复燃的气体的化学式为O2...