进入有窒息风险的场所必须携带()。A.安全带 B.氧表 C.手电筒 D.救生圈

题型:单项选择题

问题:

进入有窒息风险的场所必须携带()。

A.安全带

B.氧表

C.手电筒

D.救生圈

考点:核工程核电能源技术工考试技术工考试题库
题型:单项选择题

全员设备管理追求生产系统综合效率最大化,而提高设备()则是其根本途径。

A、综合效率

B、应用效率

C、检修效率

题型:单项选择题

泌尿系造影常用的X线检查方法是()

A.膀胱造影

B.肾动脉造影

C.逆行肾盂造影

D.静脉尿路造影

E.腹膜后充气造影

题型:单项选择题

对振荡闭锁装置的基本要求是什么?

题型:单项选择题

热力学三定律是现代物理学研究的一个重要内容。其中,根据热力学第一定律,我们可知道( )。

A.任何热机的效率都不可能达到100%
B.在温度达到绝对零度时,物质系统(分子或原子)无规则的热运动将停止
C.不可能造出既不需外界能量又不消耗系统内能的永动机
D.热不可能独立地、没有补偿地从低温物体传向高温物体

题型:单项选择题

Holiday receipts—the total sales recorded in the fourth quarter of the year—determine the economic success or failure of many retail businesses. Camco, a retailer selling just one camera model, is an excellent example. Camco’s holiday receipts, on average, account for a third of its yearly total receipts and about half of its yearly profits.
If the statements above are true, which of the following must also be true about Camco on the basis of them

A.Its fixed expenses per camera sold are higher during the fourth quarter than for any of the other three quarters.

B.It makes more profit during the first and third quarters combined than during the fourth quarter.

C.Its per-camera retail price is lower, on average, during the fourth quarter than during any one of the first three quarters.

D.It makes less profit, on average, for a given dollar amount of sales during the first three quarters combined than during the fourth quarter.

E.(E) The per-camera price it pays to wholesalers is higher, on average, during the fourth quarter than during any of the other three quarters.

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