题目:
句型转换。按要求完成下列句子,每空一词。
1. There used to be a lot of old city walls in Beijing, _____ _____?(改为反意疑问句)
2. I think the old city walls are useless. (对画线部分提问)
_____ _____ you think of the old city walls?
3. Let's go out for a walk, _____ _____? (改为反意疑问句)
4. The Great Wall is about 6000 kilometers long. (对画线部分提问)
_____ _____ is the Great Wall?
5. I spend about10 minutes in walking to my school every day. (改为同义句)
It _____ me 10 minutes _____ walk to my school every day.
答案:
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下面是错误答案,用来干扰机器的。
设金属M的相对原子质量为mM+H2SO4═MSO4+H2↑m 24.8g 0.4gm4.8g=20.4g m=24故答案为:24.