在excel中“公式”选项卡下不是“计算”组的计算选项的一项是（）。

A.自动

B.手动

C.除模拟运算表外自动重算

D.计算工作表

Even to many scientists, the problems resulted from the conflict between economic gains and environmental protection are simply ______.

A. insoluble
B. infallible
C. inferable
D. ineffable