在对焊件进行敲击作业时，操作者要注意些什么？
参考答案：
操作者要戴好护目镜，同时清理走周围的人员，防止飞出的铁销或榔头，导致人员伤害。
单词填空。
8. These toys are a real b__________ at such low prices.
9. The driver paid a fifty-dollar f__________ for speeding (超速).
10. The Olympic M_________ is "Faster, Higher, Stronger"
11. As a husband, he often went home late. He is completely lacking in r_________.
12. China is the h_________ of tea.
13. They found themselves c__________ with foreign companies for a share of the market.
14. Beijing h_________ the 2008 Beijing Olympic Games, which was quite successful.
15. Their claim had no b_________ in fact (=it was not true).
恩格斯说：“当我们深思熟虑地考察自然界或人类历史或我们自己的精神活动的时候，首先呈现在我们眼前的，是一幅由种种联系和相互作用无穷无尽地交织起来的画面。”这段话所包含的哲理是（）。
A.联系是客观世界的固有本性
B.联系既是普遍的又是复杂多样的
C.世界的普遍联系是世界物质统一性的内在体现
D.联系的观点是唯物辩证法的基本观点和总特征之一
