下列乘法中,不能运用平方差公式进行运算的是[ ]
A.(x+a)(x﹣a)
B.(a+b)(﹣a﹣b)
C.(﹣x﹣b)(x﹣b)
D.(b+m)(m﹣b)
答案:B
已知点(1-2a,a-4)不在第三象限,则整数a的值可以取( )
A.1
B.2
C.3
D.4
My request is that the information referred to in my report ________ Mr. Brown without delay.
A.to be e-mailed
B.be e-mailed
C.e-mailed
D.being e-mailed