Ⅱ类洞型咬合面鸠尾形设计根据A．邻面龋的深浅 B．邻面洞的位置 C．邻面龋的牙位 D

2是______，但不是______

A．合数 B．质数 C．偶数．

Finding her car stolen, _____.

A．a policeman was asked to help

B．the area was searched thoroughly

C．it was looked for everywhere

D．Mrs. Green reported it to the police

一次反应，即由原料烃类经热裂解生成（）和丙烯的反应。

当年名义利率一定时，按月计息时，实际利率应( )。

A．大于名义利率

B．小于名义利率

C．等于名义利率

D．等于周期利率

SQL是______语言。