理论重量在计算商品的重量时可以作为一种标准。()
参考答案:错
—Can Jenny speak English?
—_________, but he can speak Chinese.
A.Yes, he does
B.No, he doesn’t
C.Yes, he can
D.No, he can’t
一个两位数,个位数字是十位数字的两倍,十位数字为x,那么这个两位数是( )
A.3x
B.12x
C.21x
D.21x+2