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【多选题】
中枢性眩晕与周围性眩晕的区别
A.
中枢性眩晕运动幻觉不突出
B.
周围性眩晕头部运动会加重症状
C.
中枢性眩晕极少出现听力下降
D.
周围性眩晕恢复需要几个月或更长时间
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【单选题】喷射混凝土施工时,为防止混凝土因自重而脱落,可掺用适量______。
A.
早强剂
B.
缓凝剂
C.
速凝剂
D.
加气剂
【单选题】喷混凝土施工时,为防止混凝土因自重而脱落,可掺用适量()
A.
早强剂
B.
缓凝剂
C.
加气剂
D.
速凝剂
【单选题】The old professor has three sons,________are doctors.
A.
all of them
B.
all of whom
C.
all of that
D.
all of which
【判断题】活塞连杆组的主要零部件有:活塞、活塞环、活塞销、连杆、连杆盖、连杆瓦、连杆螺栓等
A.
正确
B.
错误
【简答题】A.Grade all the homework. B.Clean the professor's office. C.Help the professor in the classroom. D.Sort all the documents.
【判断题】活塞连杆组的主要零部件有:活塞、活塞环、活塞销、连杆、连杆盖、连杆瓦、连杆螺栓等。( )
A.
正确
B.
错误
【简答题】A.The professor has graded the paper. B.The professor has been in the meeting all week. C.The professor hate, to grade the paper. D.The professor has read his paper on the meeting.
【单选题】Professor Zhang gave all the textbooks to all the pupils, except _____ who had alreadytaken them.
A.
these           
B.
ones
C.
the ones
D.
the others
【简答题】A.Grade all the homework. B.Clean the professor's office. C.Help the professor in the classroom. D.Sort all the documents.
【多选题】活塞连杆组的部件有活塞、连杆()
A.
活塞销
B.
活塞环
C.
连杆轴承
D.
连杆轴承盖
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