农业银行电话转账需输入账号后（）位
A、4
B、5
C、7
D、8
参考答案：A
直角三角形的两边长恰好是方程x2-7x+12=0的两个根，则直角三角形的斜边长是______．
—Excuse me, Madam．Taking photos is forbidden here out of security．
—I’m really sorry, I _______ of that．
A．am not informed
B．hasn’t been informed
C．hadn’t been informed
D．wasn’t informed
