你可能感兴趣的试题

判断题

Demography is the statistical study of human populations especially with reference to size and density, distribution, and vital statistics.
正确
错误

不定项选择

标准渐开线斜齿圆柱齿轮的端面模数总是小于其法面模数。（    ）

A．错误
B．正确