苏科版七年级下册数学第10章二元一次方程单元检测卷.doc

第10章二元一次方程组单元检测卷
姓名:__________ 班级:__________
题号
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一、选择题(共12小题;每小题3分,共36分)
﹣2y=0的解的是(   )
A. x=2                                   B. y=3                                   C.                                    D. 
﹣y=3的解,则m=( )
A. 0                                           B. -1                                           C. 2                                           D. 3
,代入正确的是( )
A. x﹣2﹣x=4                       B. x﹣2﹣2x=4                       C. x﹣2+2x=4                      D. x﹣2+x=4
,那么的值是(    )。
A.                                         B.                                         C.                                         D. 
、y满足方程组, 则x﹣y的值是( )
A. -1                                           B. 0                                           C. 1                                           D. 2
,AB⊥BC,∠ABD的度数比∠DBC的度数的2倍少15°,设∠ABD与∠DBC的度数别为x°、y°,根据题意,下列的方程组正确的是( )
A.                   B.                   C.                   D. 
﹣y=10的解,则m的值为(   )
A. 2                                           B. 4                                           C. 6                                           D. 10
,则a、b的值是( )
A.                            B.                            C.                            D. 
,若每组7人,则余下3人;若