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【多选题】
固定义齿的固位力主要依靠A.
摩擦力
B.
大气压力
C.
约束力
D.
粘接力
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【单选题】We get _______ sometimes when we study in a group. But we can learn from each other in this way.
A.
patient
B.
silly
C.
noisy
D.
unfair
【单选题】The new study in this passage shows that ______.
A.
many American are very practical when they search for a spouse
B.
American 20-somethings have a largely romantic view of marriage
C.
Romantic view of marriage might lead marriage to a happy ending
D.
Americans are fond of marriage life so they will not care cohabitation
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