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【多选题】
以下对Bass刷牙法描述正确的是;A.
刷毛与牙呈45°角
B.
水平颤动不少于10次
C.
颤动时移动距离仅约1mm
D.
每次刷2~3颗牙
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皮皮学刷刷变学霸
举一反三
【单选题】Laura was asked several questions, but she couldn't answer ______ of them．
A.
none
B.
either
C.
neither
D.
Any
【简答题】真核细胞的核糖体由沉降系数各为____ S和 ____S的两个亚基组成。大亚基含 S rRNA, S rRNA, S rRNA各一分子和大约 ____种蛋白质。小亚基含 ____SrRNA和大约 种蛋白质。
【简答题】Questions 29 to 31 are based on the passage you have just heard. 第29题： A) It limited their supply of food. B) It made their eggshells too fragile C) It destroyed many of their nests. D) It killed many...
【单选题】She wanted to improve her English to a point where she could speak comfortably with anyone.
A.
a. She wanted to become fluent in English.
B.
b. She wanted to advance her English ability like a native speaker.
C.
c. She wanted to improve on her English.
D.
d She wanted to fluent her English.
【单选题】I hear you’ve got a pen pal. Could you tell me ___________? [ ]
A.
where does she come from
B.
where will she work
C.
what her name is
D.
How did you know each other
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