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【简答题】
Most of us like traveling. It’s very relaxing. I usually travel with my family every summer. Many people like to travel by plane, but I don’t like it, because the airport is usually far from the city. We have to get there early and wait for hours for the plane to take off and it is often late. People can’t open the window or choose ( 选择 ) what they want to eat. Planes are fast ( 快 的 ), but it takes hours to get from the airport to the city. I like traveling by train. I think it’s safe ( 安全的 ) and comfortable. Railway stations are usually in cities. When I’m late for a train, I can take another one. I can walk around in the train and open the window. I can see many interesting things on the way, but it also takes a little more time. I also like traveling by car. I can start my journey when I want to, and I don’t need to go to a railway station or an airport. I can take many things with me in a car, but sometimes there are too many cars on the road. But as the saying goes, “You can’t have everything in life.”
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【单选题】Can Rich wait on tables?
A.
Yes, he can.
B.
No, he can't.
C.
no information
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A.
电位分析法
B.
直接库仑法
C.
库伦滴定
D.
电增重法
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A.
间距变大.
B.
间距变小
C.
间距不变,但明暗条纹的位置交替变化
D.
没有任何变化.
【单选题】在如图所示的单缝夫琅禾费衍射实验中,若将单缝沿透镜光轴方向向透镜平移,则屏幕上的衍射条纹
A.
不发生变化
B.
间距变大
C.
间距不变,但明暗条纹的位置交替变化
D.
间距变小
【单选题】在如图所示的单缝夫琅禾费衍射实验中,若将单缝沿透镜光轴方向向透镜平移,则屏幕上的衍射条纹
A.
间距变大
B.
间距变小
C.
不发生变化
D.
间距不变,但明暗条纹的位置交替变化
【单选题】Mike and Sandy are two woodworkers who both make tables and chairs. In one month, Mike can make 4 tables or 20 chairs, where Sandy can make 6 tables or 18 chairs. Given this, we know that the opportun...
A.
1/5 table for Mike and 1/3 table for Sandy.
B.
1/5 table for Mike and 3 tables for Sandy.
C.
5 tables for Mike and 1/3 table for Sandy.
D.
5 tables for Mike and 3 tables for Sandy.
【简答题】The restaurant can always find tables for its . A) s B) regulars C) visitors D) representatives
【单选题】Mike and Sandy are two woodworkers who both make tables and chairs. In one month, Mike can make 4 tables or 20 chairs, where Sandy can make 6 tables or 18 chairs. Given this, we know that
A.
Mike has a comparative advantage in tables.
B.
Sandy has an absolute advantage in chairs.
C.
Mike has an absolute advantage in tables.
D.
Sandy has a comparative advantage in tables.
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【判断题】STC15W4K58S4单片机片内集成的A/D器件是双积分式。
A.
正确
B.
错误
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