皮皮学，免费搜题
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【多选题】
球墨铸铁的主要特点有( )。A.
成本较贵，生产不便
B.
综合机械性能接近
C.
含碳量较灰口铸铁低
D.
抗拉强度远超过灰口铸铁
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皮皮学刷刷变学霸
举一反三
【单选题】______fathers are both doctors.
A.
Lily's and Lucy
B.
Lily's and Lucy's
C.
Lily and Lucy's
D.
Lily and Lucy
【单选题】The decision of the university to close the swimming pool at weekends____an angry reaction among students.
A.
created
B.
provoked
C.
stimulated
【单选题】We________ in the swimming pool at that time.
A.
were planning to swim
B.
are planning to swim
C.
were planning swimming
D.
are planning swimming
【单选题】We________ in the swimming pool at that time.
A.
are planning to swim
B.
were planning to swim
C.
are planning swimming
D.
were planning swimming
【单选题】We _____ in the swimming pool at that time .
A.
are planning to swim
B.
were plaaning to swim
C.
are planning swim
D.
were planning swim
【单选题】_______fathers are bothscientists.
A.
Jim's and Bob
B.
Jim's and Bob's
C.
Jim and Bob's
D.
Jim and Bob
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