题目

--Class begins. Who’s on duty? Who is absent? ---It’s me, Jenny. Everyone except Linda and Tom ____________ here. A.am             B.is              C.are            D.be 答案：B12．指出下列命题的题设和结论．（1）等角的补角相等；（2）对顶角相等；（3）两条直线被第三条直线所截，同位角相等；（4）同旁内角互补，两直线平行；（5）如果|a|=|b|，那么a=b．