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【单选题】
初期龋的变化不包括（）A.
硬组织发生
B.
牙釉质出现龋洞
C.
牙齿透明度下降
D.
牙釉质呈白垩色改变
E.
晶体结构改变
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【单选题】Which sentence is the topic sentence in Paragraph 5?
A.
The 1st sentence
B.
The 2nd sentence
【单选题】国际法协会专门为解释CIF合同而制定的国际贸易惯例是( )。
A.
《海牙规则》
B.
《1932年华沙—牛津规则》
C.
《1941年美国对外贸易定义(修订本)》
D.
《2000年国际贸易术语解释通则》
【单选题】Sentence 5 is a _____ .
A.
topic sentence
B.
sub-topic
C.
supporting detail
D.
concluding sentence
【简答题】The meaning of the sentence “But the city escaped the worst” is that ________. [A] many people escaped from the city [B] the flood attacked the city heavily [C] the flood did not attack the city at al...
【简答题】No way! I’m not doing that. The function of the sentence is _______ and it is ______.
【单选题】Look at the four squares [m] that show where the following sentence could be inserted in the passage. They live on the feathers of birds or the fur of animals. Where could the sentence best be added? ...
A.
Square Ａ.
B.
Square Ｂ.
C.
Square Ｃ.
D.
Square Ｄ.
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