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Three Things to Do Before You Are 18 Are you bored with your daily life? Here are some things you should try before you are 18, because after that it’s too late. Learn to swim Seriously, this is so important that it can save your life. If you can’t swim well, you won’t be able to do water sports like waterskiing, surfing and diving. Even taking a boat trip will be dangerous for you. Make sure you do it. Try at least one kind of team sports Being a good team player is an important skill in life. You can’t just think of yourself, but have to work well with other people. Other advantages of team sports like basketball, football and baseball are that they keep you fit and healthy, and they are also great fun. Teams usually have a good social life too – you’ll go to lots of parties and make many friends. Collect something One of the best hobbies for under – 18s is collecting things. You could collect kinds of  stamps, or you could collect things that make you remember what you have done, like cinema tickets for films you have seen or emails from friends. The best way to collect is to have a special album to put your collection in and to write what each thing means to you. That way you won’t forget. 小题1:The most important reason for learning to swim is that _________. A. it can save your life B. it can make you healthy C. you might easily do lots of things 小题2:“A good social life” in the passage means____________. A. you’ll study in groups B. you’ll go to parties and make many friends C. you’ll take part in many matches 小题3:The writer tells us that one of the best hobbies is to___________ . A. collect something B. do some water sports C. send emails to your friends 小题4:What kind of collection is NOT mentioned(提及) in the passage? A. stamps       B. cinema tickets       C. snowballs 小题5:The passage is mainly about ____________ before you are 18. A. good habits to keep       B. skills to have      C. things to do
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举一反三
【单选题】( )是指在不考虑泄漏的情况下,在单位时间内所排出的油液体积
A.
理论流量
B.
实际流量
C.
泄漏流量
D.
排量
【多选题】引起肥胖的原因很多,主要有( )几个方面。
A.
遗传与环境因素
B.
年龄
C.
生活及饮食习惯
D.
神经精神因素
【判断题】理论流量是指不考虑液压泵泄漏损失情况下,液压泵在单位时间内输出油液的体积。
A.
正确
B.
错误
【判断题】理论流量是指在不考虑泄漏的情况下,在单位时间内所排出的油液体积。
A.
正确
B.
错误
【单选题】压差水流开关属于什么类型的监控点( )?
A.
AI
B.
DI
C.
AO
D.
DO
【单选题】强制降档开关产生的信号类型属于( )。
A.
脉冲式
B.
模拟式
C.
开关式
D.
电子式
【简答题】理论流量是指在不考虑液压泵的泄漏流量的情况下,在单位时间内所排出___________的平均值。
【单选题】换档模式开关产生的信号类型属于( )。
A.
脉冲式
B.
模拟式
C.
开关式
D.
电子式
【单选题】( )是指在不考虑泄漏的情况下,在单位时间内所排出的油液体积
A.
泄漏流量
B.
理论流量
C.
实际流量
D.
排量
【单选题】有关润湿的描述错误的是
A.
是液体在固体表面自发铺展的一种界面现象
B.
接触角θ为气-液界面的切线和固-液界面的夹角,来表示液体对固体的润湿性。
C.
θ角小于90度时,表示液体对固体的润湿性良好
D.
当θ角大于90度时,表示液体对固体的润湿性好
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