PowerPoint幻灯片浏览视图中,若要选择多个不连续的幻灯片,在单击选定幻灯片前应该按住()。
A、Shift键
B、Alt键
C、Ctrl键
D、Enter键
参考答案:C
— Why are you so busy, Mike?
— I ____ a novel these days. [ ]
A. was writing
B. wrote
C. am writing
D. have written
1/8,1/27,1/64,1/125,( )
A.1/224
B.1/216
C.1/240
D.1/252