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【单选题】
输送浓硫酸的喷射器为了防腐,内壁可采用以下那种材料:( )A.
环氧树脂
B.
有机玻璃
C.
聚乙烯塑料
D.
耐酸陶瓷
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【多选题】P53 EXERCISE2 football match
A.
David played football with a mask on his face
B.
David was not happy about his football match
C.
The football match was great
D.
the football match was cancelled
【单选题】听力原文：W: Exercise, exercise, exercise! We hear so much about it these days that even the experts can't agree on which exercises are best. Now some doctors are strongly encouraging arm exercises. M: Arm...
A.
They don't get rid of flabby arms.
B.
They can damage arm muscles.
C.
They aren't acceptable to most people.
D.
They can raise one's blood pressure.
【单选题】听力原文：W: Exercise, exercise, exercise, we hear so much about it these days that even the experts can't agree on which exercises are best. Now some doctors are strongly encouraging arm exercises. M: Arm...
A.
They don't get rid of flabby arms.
B.
They can damage arm muscles.
C.
They aren't acceptable to most people.
D.
They can raise one's blood pressure.
【单选题】听力原文：W: Exercise, exercise, exercise, we hear so much about it these days that even the experts can't agree on which exercises are best. Now some doctors are strongly encouraging arm exercises. M: Arm...
A.
They don't get rid of flabby arms.
B.
They can damage arm muscles.
C.
They aren't acceptable to most people.
D.
They can raise one's blood pressure.
【单选题】听力原文：W: Exercise, exercise, exercise! We hear so much about it these days that even the experts can't agree on which exercises are best. Now some doctors are strongly encouraging arm exercises. M: Arm...
A.
They don't get rid of flabby arms.
B.
They can damage arm muscles.
C.
They aren't acceptable to most people.
D.
They can raise one's blood pressure.
【简答题】衡量试样拉伸试验的强度指标有__________________和_______________等,他们分别用符号Rel、Rm来表示。
【简答题】衡量试样拉伸试验的强度指标有（）、（）等，它们分别用符号（）、（）表示。
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