使用物拉葫芦过程中,已吊起设备,需停留时间较长时,必须(),以防止时间过久而自锁失灵

题型:单项选择题

问题:

使用物拉葫芦过程中,已吊起设备,需停留时间较长时,必须(),以防止时间过久而自锁失灵。

A.将手拉链拴在起重链上

B.用人拉住手拉链

C.将重物放回地面

D.将手拉链固定住

考点:起重机操作工考试安装起重工(初级)安装起重工(初级)题库
题型:单项选择题

牙尖交错的标志是指哪一对牙之间的关系()

A.A

B.B

C.C

D.D

E.E

题型:单项选择题

______on the river. It is not safe.    [ ]

A. Don't skating

B. Don't skate

C. Skate

D. Not skate

题型:单项选择题

何谓近后备保护?近后备保护的优点是什么?

题型:单项选择题

园林树木整形修剪中,开张枝条的主要方法有撑枝、拉枝。

题型:单项选择题

Statuses are marvelous human inventions that enable us to get along with one another and to determine where we "fit" in society. As we go about our everyday lives, we mentally attempt to place people in terms of their statuses. For example, we must judge whether the person in the library is a reader or a librarian, whether the telephone caller is a friend or a salesman, whether the unfamiliar person on our property is a thief or a meter reader, and so on.

The statuses we assume often vary with the people we encounter and change throughout life. Most of us can, at very high speed, assume the statuses that various situations require. Much of social interaction consists of identifying and selecting among appropriate statuses and allowing other people to assume their statuses in relation to us. This means that we fit our actions to those of other people based on a constant mental process of appraisal and interpretation. Although some of us find the task more difficult than others, most of us perform it rather effortlessly.

A status has been compared to ready-made clothes. Within certain limits the buyer choose style and fabric. But an American is not free to choose the costume of a Chinese peasant or that of a Hindu prince. We must choose from among the clothing presented by fit, as well as by our pocketbook. Having made a choice from minor adjustments, we tend to be limited to what the stores choice among them is limited.

By saying that "an American is not free to choose the costume of a Chinese peasant or that of a Hindu prince", the writer means ().

A.different people have different styles of clothes

B.ready made clothes may need alterations

C.statuses come ready made just like clothes

D.our choice of statuses is limited

更多题库