| The air surrounding us is important to
everyone. Without air, we could not exist. Everyone understands that. But air is
necessary in many other ways — ways that are not always so obvious or widely
known. If we did not have air, there would be no sound. Sound travels through air. Where there is no air, there is no sound. Without air there would be no fire. There would be no automobiles, since motors need air in order to operate. Without air, there would be no wind or clouds. The night time would be very cold and the days very hot. We would be forced to seek shelter from the sun, as there would be no atmosphere to protect us from the sun’s deadly rays. In this huge ocean of air surrounding the earth, there is more energy than in all the coal, oil and gas we have on the earth. Electrical energy is collected in the at A. We all know that we can’t exist without air. B. Without air, we can’t hear anything. C. Men have studied electricity in the air for centuries. D. There’s huge energy in the air surrounding the earth. [多选题] 公司内部培训师分为（）
A.初级内训师 B.中级内训师 C.高级内训师 D.见习内训师" [多项选择]下面哪些是计算机最常用的外存储器
A. 软磁盘 B. 硬盘 C. 光盘 D. 主板 E. 内存 [单选题]梯子使用时应放置稳固，与地面的夹角宜为（）。
A.45° B.60° C.75° D.80° [单选题]自动站间闭塞区段出站色灯信号机显示（ ）时，准许列车由车站出发。
A.一个绿色灯光 B.一个黄色灯光 C.两个绿色灯光 D.一个绿色灯光和一个黄色灯光 [单项选择]项目核准文件有效期为( )。
A. 1年 B. 2年 C. 半年 D. 3年 [单选题]下列属于客户现金流量表支出项目的有()。
Ⅰ．房地产贷款月供支出
Ⅱ．学费、培训费
Ⅲ．医疗费用
Ⅳ．信用卡透支
A.Ⅰ、Ⅲ、Ⅳ B.Ⅰ、Ⅱ、Ⅲ C.Ⅰ、Ⅱ、Ⅲ、Ⅳ D.Ⅱ、Ⅲ、Ⅳ [单项选择]That battered old hat of his is a ______ joke to all his friends.
A. steady B. standing C. persisting D. stable [判断题]选择F3键“电空制动”并检查制动屏设置是否正确。( )
A.正确 B.错误 [判断题]在自动闭塞的电气化区段上更换钢轨时,拆装回流线的工作,由施工负责人指定的（ ）
A.正确 B.错误 [单项选择]井下探放水包括（）。
A. 探水和放水 B. 探水 C. 放水 D. 以上都不对 [单项选择]在多层圆筒壁定态导热中，通过每层的( )物理量保持不变。
A. (A) 温度差 B. (B) 导热速率 C. (C) 热通量 D. (D) 热阻 [多选题]“劳模贷”不得用于以下用途：
A.购车、购房及偿还住房抵押贷款 B.证券、期货等资本市场投资 C.用于股本权益性投资及注册资金 D.所经营企业的固定资产投资 我来回答: 提交
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