8. 67、宝玉挨打之后，下面人物没来探望宝玉的是（ ）。 A. 林黛玉 B. 薛宝钗 C. 史湘云 D. 尤三姐 ...

1. Thanksgiving Day on the fourth Thursday of November is uniquely an American holiday. It __1__ back to the arrival of some of the first European settlers in the New World. America has been blessed with __2__ land and rich natural resourc...

1. When people from two cultures meet, they often borrow objects and __1__ from one another. Sometimes, this __2__ changes in both cultures. China and Europe have been __2__ with each other for more than 2000 years. Europe borrowed much mo...

2. I’ll accept the job ________ I don’t have to get up early. A. since B. even though C. if D. though ...

4. One silly question I simply can't stand is "How do you feel". Usually the question is asked of a man in action--a man on the go, walking along the street, or busily working at his desk. So what do you expect him to say? He'll probably s...

7. 浇口的主要作用之一是防止熔体倒流，便于凝料与塑件分离。（ ） A. 错误 B. 正确 ...

12. 成型总压力是指塑料（ ）时所需的压力，而压机的顶出力是保证压缩模推出机构的动力。 A. 压缩成型 B. 合模过程中 C. 开模机构 D. 推出机构 ...

11. 多型腔的注射模各腔的成型条件是一样的，熔体到充满各型腔的时间是相同的，所以适合成型各种精度的塑件，以满足生产率的要求（ ） A. 错误 B. 正确 ...

9. 下列因素不会造成塑件成型后的表观缺陷（ ） A. 成型工艺条件 B. 注射机类型 C. 模具浇注系统设计 D. 塑件成型材料 ...

2. 下列离子中外层 d 轨道达半满状态的是（ ）。 A. Cr3+ B. Co3+ C. Cu+ D. Fe3+ ...