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【简答题】
试述小肠绒毛的形成、结构和功能。
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举一反三
【单选题】—Guess what? Tom has failed in the exam ____ second time. —How come? He is ___ second to none in English in our class.
A.
a; a
B.
the; a
C.
a; /
D.
the; the
【简答题】电气原理图中连线和布线有哪些要求?
【单选题】--- How come your father can read books in German? --- Well, he____on a project with some German engineers for 3 years when he was young.
A.
worked
B.
was working
C.
had worked
D.
would work
【简答题】Mike lives in Zhengzhou of China. But he is from Canada. He is 12 years old this year. He speaks English. And he speaks Chinese a little. Mingming is his good friend. He is a Chinese boy. He often goe...
【单选题】____ English for more than six years, he can speak and work very well with that businessman from England. [ ]
A.
To have learned
B.
To learn
C.
Learning
D.
Having learned
【简答题】阅读理解。 A. so this year I'm going there, too. B. he went out tor a walk. C. He always stayed in England for his holidays. D. Just then an old man selling maps went past him. E. a bicycle knocked him dow...
【简答题】读下面的 电气原理图,分析下列问题: (1)电气原理图中电动机有几种工作状态? (2)电气原理图中通过什么电器实现什么保护? (3)说明SA、SQ的作用。
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