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【单选题】
成人正常脉率为A.
60-80次/分
B.
80-100次/分
C.
60-100次/分
D.
60-90次/分
E.
90-100次/分
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反馈参考答案：
举一反三
【单选题】Please don't hesitate to write to us any proposals ( ) markteing walnuts.
A.
concerning
B.
concerned
C.
concern
【单选题】听力原文：W：Now，Mr．Black，don't hesitate to help yourself to some more potatoes，vegetables or roast beef. M：It's been a wonderful dinner，but if I eat another bite，I think I'll burst． Q：What will the man do?...
A.
To take some more vegetables.
B.
To avoid taking any more food.
C.
To pass the woman the meat.
D.
To help to prepare the potatoes.
【简答题】If we can help you further,please don't hesitate to get in touch with us.
【单选题】If in doubt, don't hesitate to ask me.
A.
simple sentence
B.
compound sentence
C.
complex sentence
D.
compound-complex sentence
【单选题】— Everything begins hard. Don't hesitate to ____ me if you are in difficulty. — Thank you. I will. [ ]
A.
turn out
B.
turn in
C.
turn to
D.
turn on
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