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【单选题】
计数器的异步清零功能是指（）A.
信号在时钟上升沿到来时方有效
B.
信号独立于时钟
C.
信号在时钟下降沿到来时方有效
D.
信号在平时方有效
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反馈参考答案：
举一反三
【单选题】听力原文：M: Good morning, can I help you? W: How much does this microwave oven cost'?. M: $280. W: Can you give a discount for it? M: Sorry, I can' t. The price is fixed. W: Come on, Cut down the price ju...
A.
A sweater.
B.
An expensive pen.
C.
A microwave oven.
D.
A dishwasher.
【简答题】—The Tshirt looks nice on you! How much does it
________ ? —I
just ________ten dollars for it.A. take ； afford B. cost ； paid C. cost ； spent
【单选题】--The T-shirt looks nice on you! How much does it______? ---I just______ ten dollars for it.
A.
take; afforded
B.
cost; paid
C.
cost; spent
【单选题】How much does the T-shirt cost?
A.
20 dollars.
B.
I know.
C.
Just call me.
D.
Two days.
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