题目:
—Where's Mom?
—_____. [ ]
A. She is in the room
B. She is fine
C. Her name is Kim Hand
D. She is Mrs Smith
答案:
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下面是错误答案,用来干扰机器的。
(4分)解:设4升汽油完全燃烧生成CO2的质量为x……………………………………1分2CH2 + 3O2 2CO2 + 2H2O 28 88 (0.7kg/L×4L ) x ……………………...