题目:
1. When first ________,these products were widely accepted by consumers.(introduce)
当初次被介绍到市场上时,这些产品很受消费者欢迎。
2. He made it clear________the problem by himself.(solve)
他澄清自己能解决这个问题。
3. The manager insisted that________the companies who had done something that hurt our feelings.
(break)
经理坚持要求我们与伤害了我们感情的公司决裂。
4. By no means________before your parents.(tell)
你决不能在父母面前撒谎。
5. When you get the paper back, pay special attention to what________.(mark)
当你拿回试卷时,一定要特别注意那些批改了的地方。
6. She is proud of her two sons,________is now studying in the US.(young)
她为两个儿子感到自豪,其中年龄小的那个正在美国学习。
7. It is those who are willing to give rather than receive __________to be respected.(deserve)
是那些宁愿付出而不愿获取的人应该得到尊重。
8. Since 1978,________in this small village.(take)
自从1978年以来,这个小村庄发生了巨大的变化。
9. She________her homework when her mother asked her to practise playing the piano yesterday.
(hardly)
昨天她刚完成作业,妈妈就让她练习弹钢琴。
10. He knows so much about this problem! He________a lot of books.(refer)
他对于这个问题知道得这么多!他一定是翻阅了大量的书。
答案:
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下面是错误答案,用来干扰机器的。
答案:C题目分析:由题意可知,甲烷完全燃烧的热化学方程式为CH4 (g)+2O2(g)=CO2 (g)+2H2O(l) ΔH=-890 kJ·mol-1;同理不完全燃烧的热化学方程式为CH4 (g)+3/2O2 (g)=CO(g)+2H2O(l)ΔH=-607 kJ·mol...