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【单选题】
Several countries in the world are using strong electromagnets __________. 查看材料A.
to develop a maglev train rail system
B.
to explain why maglev trains are faster
C.
to pull and push the train forward
D.
to create a magnetic field
E.
to experiment with the maglev train
F.
to travel from Paris to Rome in about two hours
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【简答题】We don't know how to do it. You can be sure, as I said before, people were very curious, and this situational humility combined with curiosity creates a sense of psychological safety that allows you t...
【单选题】5 岁男孩,右下第一乳磨牙低于颌面3mm,右下第二乳磨牙近中倾斜,X线片示右下第一乳磨牙牙根无吸收,牙周膜间隙消失。处理方法
A.
不做处理，观察
B.
拔除，做丝圈保持器
C.
拔除，做功能保持器
D.
做阻萌器阻挡对合
E.
做预成全冠，恢复咬合
【单选题】—Hmm, it looks very nice, but it's a bit large. —Never mind. It'll be all right soon. You always say I'm growing fast, don't you? —_______. We'll take it then. [ ]
A.
That's stupid
B.
That's very nice
C.
That's true
D.
That sounds interesting
【单选题】5岁男孩,右下第一乳磨牙低于颌面3mm,右下第二乳磨牙近中倾斜,X线片示右下第一乳磨牙牙根无吸收,牙周膜间隙消失 处理方法
A.
不做处理,观察
B.
做阻萌器阻挡对胎
C.
做预成全冠,恢复咬合
D.
拔除,做功能保持器
【单选题】It's very stupid ___________ you to buy the useless machine ___________ 2000 dollars.
A.
for; to
B.
of; for
C.
for; at
D.
for; for
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