皮皮学，免费搜题
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【简答题】
A．They tied the pirates with strong ropes. B．They killed all the pirates. C．They killed 24 harmful snakes. D．They killed themselves.
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皮皮学刷刷变学霸
举一反三
【单选题】Tom is good at maths, so I think he is the student_____can help you to work out this problem.
A.
whom
B.
who
C.
which
D.
what
【单选题】Tom is good at Maths so I think he is the student _______ can help you to work out this problem.
A.
who
B.
whom
C.
which
D.
what
【单选题】尼龙610的重复单元是
A.
-NH(CH 2 ) 6 NHCO(CH 2 ) 4 CO-
B.
-NH(CH 2 ) 6 NHCO(CH 2 ) 8 CO-
C.
-NH(CH 2 ) 8 NHCO(CH 2 ) 4 CO-
D.
-NH(CH 2 ) 10 NHCO(CH 2 ) 4 CO-
【简答题】尼龙66的重复单元是（）。
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