在Excel2003单元格中输入:=(Average(16,-10)-Pi()),则该单元格显示的值是()。
A.大于零
B.等于零
C.小于零
D.不确定
参考答案:C
The teacher apologized late.
A.to his students to arrive
B.to his students for arriving
C.at his students to arrive
D.at his students for arriving
装有瓦斯继电器的变压器,安装时,应使顶盖沿瓦斯继电器方向有()的升高坡度。
A、0.5%~1%
B、1%~1.5%
C、1%~2%
D、1.5%~2%