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【单选题】
关于急性阑尾炎的描述,哪正确的?A.
早期少见恶心和食欲减退
B.
早期均有发热
C.
腰大肌征阳性者即可诊断阑尾炎
D.
均有转移性右下腹痛
E.
穿孔后腹痛可暂时减轻
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举一反三
【简答题】驱动桥通过主减速器( )改变转矩的传递方向。
【单选题】Which of the following statements is true?
A.
The wide influence of conservatism can be found in American daily life.
B.
Few English people atrach great importance to local and individual character.
C.
English people are known for their conservatism.
D.
English people like small talk and usually espress their mind freely.
【多选题】驱动桥的作用：
A.
通过主减速器齿轮的传动，降低转速，增大转矩；
B.
主减速器采用锥齿轮传动，改变转矩的传递方向；
C.
通过差速器可以使内外侧车轮以不同转速转动，适应汽车的转向要求；
D.
通过桥壳和车轮，实现承载及传力作用。
【简答题】C2B电商模式是以( )为中心。
【单选题】Which of the following statements is true?
A.
The wide influence of conservatism can be found in American daily life.
B.
Few English people attach great importance to local and individual character.
C.
English people are known for their conservatism.
D.
English people like small talk and usually espress their mind freely.
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