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【单选题】
按毒物的性质分类,毒物不包括()A.
环境因素
B.
化学因素
C.
物理因素
D.
生物因素
E.
致癌物
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皮皮学刷刷变学霸
举一反三
【单选题】— Did you have a wonderful time at the ball last night? — ____ ! I’ve never had a more wonderful time all my life.
A.
You bet
B.
No problem
C.
Don’t mention it
D.
Not really
【单选题】— Did you watch the programme I Am a Singer on Friday night? It was wonderful. — I wish I had, but I ____________ for the mid-term examination.
A.
prepared
B.
was preparing
C.
had prepared
D.
would prepare
【简答题】7-4. STC 89C5 2 串行口有几种工作方式?有几种帧格式?各工作方式的波特率如何确定?
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