搜题
王老师:19139051760(拨打)
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第1题

在钢的化学元素中,下列哪一种元素的有害作用主要是使钢在低温时韧性降低并容易发生脆性破坏()
·硅
·锰
·硫
·磷
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第2题

What game does Bob want to play( )
·Ping-pong.
·Tennis.
·Basketball.
·Football.
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第3题

What wakes Bob from his daydream( )
·The football.
·The bell.
·The clock.
·The clouds.
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第4题

What is Bob doing now ( )
·He is watching TV.
·He is playing football.
·He is having classes.
·He is playing
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