—Why didn't you cry for help when you were robbed (被抢劫)?
—If I opened my mouth, they might find my four gold teeth. That would be !
A:bad
B:much worse
C:worst
D:the worst
下列生物钟,哪一个生物的细胞结构显著不同于其它生物( )
125×(8×____)=125×____×12
当a=____ 时,方程组 2x-y=a+1x+2y=2a的解为x=y.