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【判断题】
空调系统加注制冷剂只能从系统高压端加注A.
正确
B.
错误
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】Some places are always very dry. There is not a lot of rain. Sometimes people make cities in dry places. That is not a good idea. Other places do have enough water. But these places are not always wis...
【简答题】We can help save water, too. We can save water at home. We can take shorter showers. We can turn off the water when we clean the dishes or brush our teeth. We can clean our cars less often. 6. How can...
【判断题】As a listener, we can just shut our ears when the speaker is not talking about things we are interestedinto save more time.
A.
正确
B.
错误
【单选题】Some places are always very dry. There is not a lot of rain. Sometimes people make cities in dry places. That is not a good idea. Other places do have enough water. But these places are not always wis...
A.
Don't clean your car as often.
B.
Drink less water in summer.
C.
Take shorter showers.
D.
Don't leave the water running when you wash the dishes.
【简答题】脓液有甜腥臭味的是（ ）
【单选题】We can not save our image files in which device permanently?
A.
CPU
B.
CD-ROM
C.
hard disk
D.
mouse
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