试题与答案

—I want to know if ______ a concert in o

题型:选择题

题目:

—I want to know if ______ a concert in our school hall this weekend.
—Yes. Nancy told me about it.

A. there will have
B. there will be
C. will there be
D. will there have

答案:

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罩在甲烷火焰上方的烧杯内有水雾产生,倒转过来,向烧杯中倒入少量澄清石灰水,振荡,石灰水变浑浊,说明甲烷燃烧产生了水和二氧化碳,由此推测甲烷的成分中一定含有碳、氢元素,可能含有氧元素;而罩在氢气火焰...

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