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【简答题】
We are living a fast life. It seems that everything has to be fast, for example, food, fast Internet, fast roads, fast money. Every day we try to get things done , but there are some moments that we have to slow down and enjoy our lives. We are always every day. I have to work eight hours or more a day at my full-time job. When I get home, it’s always over seven o’clock. I make an effort(努力) to something. I try to find a bit of time for my hobby—writing. I hardly ever write and work weekends. Those are my days to try to recharge (休整)and reduce the stress from my work. I sleep on the sofa during the day, some beer in the open air or go out for a picnic if the weather is nice. What I’m trying to say is this: if you don’t take some time to slow down once in a while(偶尔) and your life, it will pass you by. You can be unhealthy both in body and mind if you don’t take the time to relax. So this weekend, don’t make any . Just get up on Saturday morning your body says it’s time to get up. Make some coffee, step outside and get fresh morning air, turn on the radio and prepare yourself for nothing. 小题1: A.good B.fast C.slow D.cold 小题2: A.specially B.seriously C.directly D.quickly 小题3: A.busy B.happy C.free D.sad 小题4: A.drink B.buy C.write D.say 小题5: A.with B.except C.in D.on 小题6: A.eat B.drink C.take D.get 小题7: A.spend B.share C.enjoy D.relax 小题8: A.plans B.mistakes C.noises D.sentences 小题9: A.but B.when C.or D.so 小题10: A.any B.many C.no D.some
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【单选题】下面关于楼梯尺寸的描述正确的是( )
A.
顶层平台的水平安全栏杆扶手高度与梯段扶手高度相同
B.
楼梯段宽度的确定要考虑同时通过人流的股数
C.
楼梯平台宽度可以小于楼梯段的宽度,但应能保证人流的通行。
D.
为保证通行或搬运物件时不受影响,平台过道处的净空高度在应大于2.2m;在楼梯段处的净空高度应大于2m。
【简答题】三相异步电动机的调速方法有变极调速、 ( ) 调速和改变转差率 调速等三种。
【简答题】三相异步电动机的调速方法有( ) 调速、 ( ) 调速和 ( ) 调速等三种。
【多选题】三相异步电动机的调速方法有 调速、 调速和 调速等3种。
A.
变极
B.
变频
C.
改变转差率
【简答题】在1931—1971年,高速切削加工处在( )阶段,这一时期还没有高速加工机床,不能进行很高的切削加工实验。
【简答题】三相异步电动机的电气调速方法有 调速、变频调速和变转差率调速等三种。
【多选题】直流电动机的调速方法有:改变 () 调速、() 调速和 ()调速等三种。
A.
电枢电阻
B.
电源电压
C.
频率
D.
磁通
【单选题】楼梯 净空高度在平台过道处应大于( ) m
A.
2.2m
B.
2m
C.
1.8m
【单选题】楼梯净空高度在平台过道处应大于( )m
A.
2.2m
B.
2m
C.
1.8m
D.
2.4m
【简答题】调速方法有 、 和 等三种。
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