玻璃钢工艺管道出厂静水压试验采用3倍的设计压力进行检验。

题型:判断题

问题:

玻璃钢工艺管道出厂静水压试验采用3倍的设计压力进行检验。

考点:玻璃钢操作工考试玻璃钢操作工考试题库
题型:判断题

When people want to know about the weather, they usually go to their radios, TVs, newspapers, or to the Internet. However, you can also find many weather signs among wildlife, because of their highly developed senses. Drops in air pressure produce an effect on small animals in many ways. Mice and deer are good weather indicators. People who spend a lot of time outdoors have observed that, before a storm, field mice come out of their holes and run around. Deer leave high ground and come down from the mountains.

Birds are especially good weather indicators because they also show the effect of a pressure drop in many ways. For example, some birds become irritable(暴躁) and quarrelsome and will fight over a piece of bread. Other birds chirp and sing just before a storm. It seems they know they won’t get another chance for an hour or two. Birds also look for safe places before a storm. You will sometimes see birds settling in trees or gathering together on a wire close to a building. Pre-storm low pressure make the air so thin that birds have difficulty flying.

It is unusual to see many birds flying overhead in the summertime, rather than during the periods in the spring or autumn. Watch for other weather signs if you see this. If they fly in the wrong direction, they may be flying ahead of a storm.

By paying closer attention to some important signs in nature, we can become better prepared for any kind of weather.

小题1:The word “indicators” in paragraph 1 probably means          .

A.maps

B.services

C.signs

D.stations小题2:How can birds sense the coming of a storm?

A.By feeling a drop in air temperature.

B.By noticing the change of wind directions.

C.By feeling a drop in air pressure.

D.By noticing the movements of other animals.小题3:The best title for the text would be        .

A.Signs of a Storm

B.Drops in Air Pressure

C.Animals’ Sharp Senses

D.Nature’s Weather Signs

题型:判断题

商场的业务子系统会在数据库服务器上产生各种增删改的事务或数据查询服务请求,随着系统的不断运行,系统中的数据会不断增长,就可能会出现系统效率下降的情况,以下几种方法中不能优化查询的是______。

A.清除对大型表行数据的顺序存取

B.使用左连接操作

C.避免相关子查询

D.用排序来取代非顺序磁盘存取

题型:判断题

要对已入围供应商的交货准时率、到货率、商品质量和售前售后服务进行经常性考核。

题型:判断题

调整设计、改进施工方法和改变施工机具等属于项目目标动态控制的纠偏措施中的( )。

A.组织措施
B.管理措施
C.经济措施
D.技术措施

题型:判断题

按道氏理论的分类,趋势分为()等类型。

A.主要趋势

B.长期趋势

C.次要趋势

D.短暂趋势

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