配对样本资料的I检验所用检验统计量为()
A．A
B．B
C．C
D．D
E．E
参考答案：C
____ gets well prepared will pass the exam easily.
[ ]
A. Who
B. Anyone
C. Whoever
D. Those who
压力表缓冲器内装有隔离液，它对来自气井的压力起缓冲作用，防止压力表突然受压损坏。
