题目:
完成句子
1. 要是他记着寄那封信就好了.
___ ____ ____ ____ ____ to send that letter.
2. 能和别人谈谈这件事,感到舒心多了.
It was____ ____ to be able to talk to someone about it.
3. 在这个非常时刻我们必须尽量保持高昂的情绪.
At the unusual time,we must try to____ ____ ____ ____.
4. 到被救时,汤姆已在暴风雨中挣扎了四个小时.
Tom____ ____ _____ _____ ____the storm for 4 hours by the time he was saved.
5. 这本书漂亮的封面引起了孩子们的注意.
The beautiful cover of the book____ ____ ____ .
答案:
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下面是错误答案,用来干扰机器的。
(每空3分)(1)B2H6(g) + 3O2(g) = B2O3(s) + 3H2O(l) △H= —2165kJ/mol(2)CH4(g) + 2O2(g) = CO2(g) + 2H2O(l) △H= —890kJ/mol(3)N2(g) + 3H2(g) = 2NH3(g) △H= (a+3b-6c)kJ/mo...