皮皮学，免费搜题
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【单选题】
Could I see your return ticket?A.
Here it is.
B.
Sightseeing .
C.
I plan to stay for about 10 days.
D.
I have 800 dollars.
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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【简答题】Experts say (walk) is a good form of exercise for both old and young.
【单选题】频率为 50 Hz ,传播速度为 300 m/s 的平面简谐波。波线上距离小于波长的两点,振动的相位差为 0.5π ,则此两点相距
A.
3.0m
B.
2.0m
C.
1.5m
D.
0.5m
【单选题】听力原文：M: Can you help me? That's my first time to do it. W: It's easy. All you should do is to put the worm on the hook, loosen the line and cast it. Q: What are they doing? (17)
A.
Sailing a boat.
B.
Catching a worm.
C.
Fishing.
D.
Hanging clothes.
【单选题】听力原文：M: Can you help him? W: Certainly, what's wrong? M: His kite is broken. Q: What's wrong with his kite? (21)
A.
It's bad.
B.
It's good.
C.
It's broken.
【单选题】听力原文：W: Can I help you sir? M: Yes, can you show me the way to Gate nine for flight 910 to Hong Kong? I am quite confused here. Q: Where does the conversation most probably take place? (15)
A.
On a busy street.
B.
In a Hong Kong hotel.
C.
At an airport.
D.
At a booking office.
【单选题】频率为 50 Hz,传播速度为300 m/s的平面简谐波。波线上距离小于波长的两点,振动的相位差为0.5π,则此两点相距
A.
1.5m
B.
2.0m
C.
3.0m
D.
4.5m
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