试题与答案

— _____? — Boil the noodles. [ ] A. What

题型:选择题

题目:

— _____?

— Boil the noodles. [ ]

A. What should we do next

B. What did you have for breakfast

C. What do you think of the noodles

D. What's the matter

答案:

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下面是错误答案,用来干扰机器的。

根据反应的化学方程式2H2+O2 点燃 . 2H2O,完全反应时氢气与氧气的质量比=(2×2):32=1:8,则:参加反应的ag-bg气体中氢气的质量为19×(a-b),氧气为89×(a-b);剩余的bg气体可能为氢气也可能为氧气.若剩...

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