2,6,18,54,( )
A.108
B.72
C.162
D.216
参考答案:C
Is the weather in China the same in Brazil?
A.from one
B.as
C.as that
D.like this
()能产生不可控制目标点的自由方向的灯光。
A.目标点光灯
B.自由点光灯
C.目标线形灯
D.自由线形灯