[单选题]昼间引导手信号的显示方式为（）。
A.黄色灯光高举头上左右摇动
B.展开的黄色信号旗高举头上左右摇动
C.展开的绿色信号旗高举头上左右摇动
D.黄色灯光下压数次

[判断题]目前,国内在应对光气泄漏事故时,主要方法是喷淋吸收。
A.正确
B.错误

[单项选择]选择仪器时，最重要的是选择仪器的（）。
A. 可靠性；
B. 精度高；
C. 灵敏度高；
D. 经济。

[填空题]Over a hundred years ago, Charles Dickens shocked many of his readers when he described the conditions under which young children worked in British factories. The conditions Dickens described continue almost (1) today in many parts of the world. The only difference is that today (2) of children is limited to small industries and family businesses, such as hotels, restaurants and (3) farms, rather than to large factories.
Girls (4) more from child labor practices than boys. Many of them are forced to start work when they are only ten years old. Although the work they are given to do is often (5) , it is often harmful to their health. (6) , children as young as six years were found to be working in Asian factories, and the children were working from eight to fourteen hours a day in overcrowded and unhealthy working (7) . Sometimes a whole family group is employed, with the (8) going to a parent or

[简答题]简述HXD1电力机车四象限整流器的功用？

[单选题]5-羟色胺的前体是
A.鸟氨酸
B.谷氨酸
C.组氨酸
D.色氨酸

[填空题] Would you (36) ________ that you are in the position of a parent. Would you allow your children to read any book they wanted without first checking its (37) ________ Would you take your children to see any film without first finding out whether it is (38) ________ for them If your answer to these questions is "yes", then you are just plain (39) ________. If your answer is "no", then you are exercising your right as a parent to protect your children from what you consider to be (40) ________ influences. In other words, by acting as an (41) ________ yourself, you are (42) ________ that there is a strong case for censorship. Now, of course, you will say that it is one thing to exercise (43) ________ where children are concerned and quite another to do the same for adults. Children need protection and it is the parents’’ responsibility to provide it. But what about adults Aren’’t they old enough to decide what is good for them (44) ________________. Censorship is for the good

[单项选择]日本学者本 村尚三郎曾说过，“企业不能像过去那样，光是生产东西，而要出售生活的智慧和欢乐”，这属于以下哪种新型的营销理念（）。
A. 大市场营销理念
B. 关系营销理念
C. 文化营销理念
D. 整体营销理念

[判断题]接到停车指令后，第一干燥机、第二干燥机待丝束出最后一个罗拉后就可以停止运行。（ ）
A.正确
B.错误

[多项选择]