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【单选题】
炔烃能使溴水褪色,这个反应属于( )A.
取代反应
B.
加成反应
C.
氧化反应
D.
聚合反应
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皮皮学刷刷变学霸
举一反三
【简答题】The guy tried to run away but the policeman caught him by g ____ the collar of his coat.
【单选题】The guy tried to run away but the policeman caught him by ___ the collar of his coat.
A.
stretching
B.
grabbing
C.
filtering
D.
spotting
【单选题】The guy tried to run away but the policeman caught him by ___ the collar of his coat.
A.
running
B.
grabbing
C.
lingering
D.
memorizing
【判断题】学前儿童对一日时间的延伸（昨晚和明早）的认知水平低于对当日之内时序（上午、下午、晚上）的认知，而对未来（明早）认知的发展水平低于过去（昨晚）的认识水平。
A.
正确
B.
错误
【单选题】The guy tried to run away but the policeman caught him by ( ) the collar of his coat.
A.
grabbing
B.
securing
C.
stretching
D.
dubbing
【简答题】人际关系是通过人与人之间的交往而建立的人与人之间的＿＿的关系。
【单选题】The guy tried to run away but the policeman caught him by ( ) the collar of his coat.
A.
dubbing
B.
securing
C.
stretching
D.
grabbing
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