螺旋CT的基本结构属于
A.第一代CT机
B.第二代CT机
C.第三代CT机
D.第四代CT机
E.第五代CT机
参考答案:C
看电影时,因为电影屏幕发生______反射,所以各个方向的观众都能看到画面.
I think watching TV every evening is a waste of time—there are ____ meaningful things to do.
A.less
B.more
C.the least
D.the most