自动喷水灭火系统按喷头的构造分为()。A、湿式系统 B、雨淋系统 C、水幕系统 D、

题型:多项选择题

问题:

自动喷水灭火系统按喷头的构造分为()。

A、湿式系统

B、雨淋系统

C、水幕系统

D、水喷雾系统

E、自动启闭系统

考点:机电工程机电工程题库
题型:多项选择题

阅读下列短文,按照要求完成各题,并将答案填在答题卡标号为76-83的空格中。

Skipping rope is a great way for kids to exercise while they have fun. As a student, you can jump alone or with your classmates. You can also help turn a long rope for many others to jump over, one at a time. If you jump alone, you will need a short rope and it should be just long enough for your height. Try ropes of different lengths until you find a right one for our height.

A rope should be turned slowly. It must also be turned high enough to let you jump freely and safely. Turning the rope freely and safely needs careful timing(时间的选择). In rope jumping, timing means turning the rope slowly enough for you to jump over at the right time without striking(碰撞) your feet.

When you jump rope, your heart beats faster and your face has a healthy color. But if you jump too many times at first, you will get tired. You must learn when to stop for a rest before you jump again. If you practice, you can increase the number of times you jump without resting.

根据文章完成下面的短文。

小题1:___________ is a great way for exercise.

小题2:We can jump __________ or with classmates.

小题3:We need a short rope that is long enough for our ___________ if we jump alone.

小题4:In rope jumping, timing means ________________________________ at the right time.

小题5:Don’t jump too many times at first. You must learn __________before you jump again..

小题6:Find the topic sentence of the passage and copy it down. (找出文章的主题句并抄写下来)  ______________________________________________________________________ 

小题7:Translate the underlined sentence into Chinese. (将划线的句子翻译成中文)

_______________________________________________________________________ 

小题8:The underlined words "have fun" in the passage means “____________” in English.

题型:多项选择题

畸形舌侧窝常发生在()

A.上颌双尖牙

B.下颌双尖牙

C.上颌中切牙

D.上颌侧切牙

E.磨牙

题型:多项选择题

某旅游公司组织120人的旅游团去某地旅游,每人收取的旅行费为6000元。旅行中该旅游公司为每人支付交通费1500元,住宿费1200元,餐费700元,门票等费用600元(该旅游公司适用的营业税税率为5%)。根据以上条件,计算该旅游公司应缴纳的营业税税额。

题型:多项选择题

沿同一层位开凿的巷道为()巷道。

题型:多项选择题

危险是指系统中存在导致发生不期望后果的可能性超过了人们的承受程度,一般用()表示危险的程度。

A.可能性

B.风险度

C.损害度

D.严重性

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