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【单选题】
与细菌运动有关的结构是
A.
菌毛
B.
C.
鞭毛
D.
芽胞
E.
细胞壁
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【单选题】—Do you remember _______ vase I gave you as a birthday gift last year? —Yes, I fell in love with it at _______ first sight.
A.
a; the
B.
a; /
C.
the; the
D.
the;/
【单选题】☆997.加工火腿片,烤牛肉片适合于下列( )。
A.
拉切法
B.
锯切法
C.
铡切法
D.
推切法
【单选题】I ______ to the English Corner last Saturday, but I fell ill.
A.
did take part in
B.
would have taken part in
C.
would take part in
D.
had taken part in
【单选题】没有自吸能力的离心泵是 。
A.
双流道式
B.
底置水环泵式
C.
双侧吸入式
D.
离心旋涡泵式
【简答题】某配合φ30H6/k5,IT5=9μm,IT6=13μm,配合的最大间隙X max =+11μm。①确定孔、轴的极限偏差;②计算另一极限间隙或过盈和配合公差;③确定φ30K6孔的极限偏差。
【单选题】I ______ to the English get-together last night, but I fell ill.
A.
did came
B.
had come
C.
would come
D.
would have come
【判断题】离心泵是一种有自吸能力的液体输送机械,而往复泵是一种没有自吸能力的液体输送机械。
A.
正确
B.
错误
【单选题】下列设备中没有自吸能力的是:
A.
齿轮泵
B.
离心泵
C.
往复泵
D.
螺杆泵
【单选题】I didn’t have a good ______ last night, so I was so _____ that I fell _____ in class.
A.
sleep; asleep ;sleepy
B.
asleep; sleep; sleepy
C.
sleep; sleepy; asleep
D.
sleepy; sleep; asleep
【单选题】---Shanghai is a beautiful city. Do you think so? ---Yes, I _______ there last year and fell in love with it.
A.
go
B.
will go
C.
have gone
D.
went
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