QQ3的爆震传感器是哪种传感器（）
A.霍尔式传感器
B.振动加速度传感器
C.点出式传感器
D.负温度系数传感器
参考答案：B
等底等高的圆柱和圆锥体积和是48立方米，则圆柱的体积是（ ）立方米．
A．12
B．144
C．36
D．16
China is one of the developing countries that _____ the third world. [ ]
A. belong to
B. belongs to
C. is belonged to
D. are belonged to
