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【单选题】
听力原文:W: Hi, Bob. I heard about your accident but I didn't think it would be this bad. I can hardly recognize you. Tell me what happened? M: I just got back from Africa where I had a terrible accident in a motorcycle race. I broke both my legs when my motor failed and was hit by another motorcycle. I was laid up in a hospital over there for three weeks. W: Three weeks, that's a long time. What did you do while you were in the hospital? M: Well, if you can believe it. I read all about motorcycle racing. I love racing even if it hurts. W: But I'm afraid you don't make it look very funny. You are lucky to be alive. M: That's for sure. I am lucky to be alive. W: How soon can you get well? Did the doctor tell you? M: They say I still need to stay in bed for two weeks or so. W: I think you'll get a bit fatter by then. By the way, is there anything I can do for you? M: No, thank you. Thank you for the beautiful flowers. It's very kind of you to come and see me. W: I'll be going then. Bye. What happened to Bob?
A.
He was badly ill.
B.
He had his legs broken.
C.
He Was hit by a car.
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【单选题】滚动轴承的标记由名称、代号、标准编号三部分组成。轴承代号有基本代号和补充代号,滚动轴承的基本代号由( )三部分从左向右按顺序排列组成。表示轴承的基本结构、尺寸、公差等级、技术性能等特征。
A.
轴承类型代号、尺寸系列代号和内径代号
B.
轴承类型代号、内径代号和尺寸系列代号
C.
尺寸系列代号、轴承类型代号和内径代号
D.
尺寸系列代号、内径代号和轴承类型代号
【单选题】在pH5.12时电泳,哪种蛋白质既不向正极移动也不向负极移动?( )
A.
血红蛋白( pI=7.07 )
B.
鱼精蛋白( pI=12.20 )
C.
清蛋白( pI=4.64 )
D.
α 1 - 球蛋白( pI=5.06 )
E.
β - 球蛋白( pI=5.12 )
【单选题】滚动轴承的基本代号由( )部分组成
A.
B.
C.
D.
【单选题】在pH5.12时进行电泳,哪种蛋白质既不向正极移动也不向负极移动
A.
血红蛋白(pI=7.07)
B.
鱼精蛋白(pI=12.20)
C.
清蛋白(pI=4.64)
D.
b-球蛋白(pI=5.12)
【单选题】在pH5.12时进行电泳,哪种蛋白质既不向正极移动也不向负极移动?
A.
血红蛋白(pI=7.07)
B.
鱼精蛋白(pI=12.20)
C.
清蛋白(pI=4.64)
D.
β–球蛋白(pI=5.12)
E.
肌红蛋白(pI=7.0)
【单选题】在pH5.12时进行电泳,哪种蛋白质既不向正极移动也不向负极移动?( )
A.
血红蛋白(pI=7.07)
B.
鱼精蛋白(pI=12.20)
C.
清蛋白(pI=4.46)
D.
β-球蛋白(pI=5.12)
【简答题】托收业务按是否附带商业单据可以分为
【单选题】在pH5.12时进行电泳,哪种蛋白质既不向正极移动也不向负极移动?( )
A.
血红蛋白(pI=7.07)
B.
鱼精蛋白(pI=12.20)
C.
清蛋白(pI=4.64)
D.
ɑ-球蛋白(pI=5.06)
E.
β-球蛋白(pI=5.12)
【单选题】在 pH=5.12 时电泳,哪种蛋白质既不向正极移动也不向负极移动( )
A.
血红蛋白( pI=7.07 )
B.
鱼精蛋白( pI=12.02 )
C.
清蛋白( pI=4.64 )
D.
α - 球蛋白( pI=5.06 )
E.
β - 球蛋白( pI=5.12 )
【判断题】滚动轴承的基本代号由轴承类型代号和尺寸系列代号组成。
A.
正确
B.
错误
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