题目:
Attention, please! There _________a basketball game between our class and Class 5.
A.has
B.is going to be
C.will have
D.is going to 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...