| In the past, man didn’t have to think
about the protection of his environment. There were few people on the earth, and
natural resources seemed to be {{U}} (56) {{/U}} . Today things are
{{U}} (57) {{/U}} . The world has become too {{U}} (58) {{/U}} .
We are using up our natural resources too quickly, and at the same time we are
{{U}} (59) {{/U}} our environment with dangerous chemicals. If we
{{U}} (60) {{/U}} to do this, human life on the earth will not
survive. Everyone {{U}} (61) {{/U}} toady that if too many fish are taken from the sea, there will soon be none left. Yet, with modem fishing {{U}} (62) {{/U}} more and more fish are caught. We know that if too many trees are cut down, {{U}} (63) {{/U}} will disappear and nothing will grow on the land. Yet, we {{U}} (64) {{/U}} to use bigger and more powerful machines to {{U}} (6 A. beautiful B. unlimited C. limited D. natural [判断题]严禁扒乘机车、车辆，以车代步，禁止从行驶中的机车、车辆上跳下。
A.正确 B.错误 [填空题]《供电监管办法》规定,供电企业应当严格执行国家电价政策，按照(_______)或者(_______)，依据计量检定机构依法认可的用电计量装置的记录，向用户计收电费。
[单项选择]克汀病是由于缺乏哪种营养素引起（）。
A. 锌 B. 钙 C. 硒 D. 碘 E. 铁 [单项选择]Which statement about the Navigation Rules is TRUE?（）.
A. The rules require vessels to comply with Traffic Separation Scheme regulations B. The rules use the term safe speed C. The Rules permit a stand-on vessel to take action prior to being in extremis D. All of the above are correct [简答题] 简述建构主义教学理论的基本主张。
[单选题]电气工作人员在10kV配电装置附近工作时，其正常活动范围与带电设备的最小安全距离是( )。
A.0.2 B.0.35 C.0.4 D.0.5 [单选题]高压二氧化碳灭火系统储存装置的环境温度应为 ( )℃。
A. 0-49 B. -75 C. 0-55 D. -65 [多选题]调动（ ）时， 是否使用调车灯显调车作业，按军事代表、 发货人及本次运输的有关条件办理。 (《调细》第53条)
A.罐车 B.军事、特殊运输车辆 C.装有特殊要求货物（如 140产品等）的车辆 D.集装箱货物 我来回答: 提交
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