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【单选题】
按钮的触头允许通过的电流较小,一般不超过( )A。A.
10
B.
15
C.
5
D.
30
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【简答题】What is the main storage device in most computer systems?
【简答题】选择正确的汉意。 ( ) 1. Who is in my classroom? ( ) 2. We are students. ( ) 3. We are in the classroom. ( ) 4. I see a teacher. A. 我看见了一个老师。 B. 谁在我们的教室里？ C. 我们是小学生。 D. 我们在教室里。
【单选题】Many unnecessary items went by the wayside in the storage room. What is the meaning of the underlined words?
A.
to walk on one side of the way
B.
to be discarded
C.
to be put in the center
D.
to be treasured
【单选题】Many unnecessary items went by the way side in the storage room. What is the meaning of the underlined words?
A.
to walk on one side of the way
B.
to be discarded（被抛弃）
C.
to be put in the center
D.
to be treasured
【简答题】请阐述病毒性流感的发病机制。
【简答题】在古代,促进商业产生和发展最重要的两大因素是( )和自然环境。
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