Word的“全屏显示”只显示出文档，而没有标尺、工具栏和其他屏幕元素，欲要回到原来状态应按_____键。
A．
B．
C．
D．
参考答案：A
We had a picnic last term and it was a lot of fun, so let's have _____ one this month. [ ]
A. the other
B. some
C. another
D. other
精子保持受精能力的时间与存活时间呈正相关。（）
