腰椎间盘突出症是指()。
A.CT发现腰椎间盘突出
B.MRI发现腰椎间盘突出
C.X线平片显示有椎间盘退行性改变
D.坐骨神经痛
E.患者有与影像学所见相一致的症状和体征
参考答案:E
下面说法不正确的是[ ]
A.三角形的面积一定,底和高成反比例
B.长方形的周长一定,长和宽不成比例
C.订阅《少年报》的份数和总钱数成正比例
D.因为圆周长C= πd,所以π与d成反比例
Password is a secret series of (69) that enables a user to access a file, computer, or program. On multi-user systems, each user must enter his or her password before the computer will respond to (70) . The password helps ensure that (71) users do not access the computer. In addition, data files and programs may require a password.
A.power
B.authorized
C.accredit
D.unauthorized