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【多选题】
关于制作烤瓷冠的材料说法正确的是A.
金-铂-钯合金与瓷结合力强，很少有崩瓷现象
B.
金-钯-减低成本，但含银的合金最大的缺点是可导致瓷体的变色，通称作“绿化"
C.
银钯合金是第一种不含金的贵金属合金系列，国内称”半贵金属合金“
D.
钛及钛合金具有优异的生物相容性、良好的机械性能、抗疲劳性强、密度小、无磁性、耐腐蚀等优点，是制作牙种植体，正畸弓丝及义齿支架等理想的口腔材料
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举一反三
【单选题】Which of the following may NOT be the reason of eating disorders?
A.
Trying to keep the weight low.
B.
The fierce social competition.
C.
Maintaining a muscular but thin physique.
D.
Genetic or chemical components.
【单选题】The maximum Blood Alcohol Concentration (BAC) rate on board shall not be more than by weight any time when being testedBut watch-keepers are not allowed to drink any alcoholic beverage before their wa...
A.
0.08% /4 hours
B.
0.008%/2 hours
C.
0.04%/4 hours
D.
0.04%/2 hours
【简答题】Read the following sentences and try to match the English sentences with their Chinese equivalents.A. Excuse me, is there a vacant place?B. It’s very kind of you to invite me, but I have a prior engag...
【简答题】We have all experienced days when everything goes wrong. A day may begin well enough, but suddenly everything seems to get out of control. It seems as if a single unimportant may cause a number ...
【简答题】We have all experienced days when everything goes wrong. A day may begin well enough, but suddenly everything seems to get out of control. It seems as if a single unimportant may cause a number ...
【单选题】The interviewees opinion of exercising at desk shows that it is
A.
a good way of losing weight.
B.
a solution that doesn't work.
C.
an efficient way of improving health.
D.
a bad way of wasting time.
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