霍乱兼表证治用分利兼表散法，后世称为急开支河，共代表方剂为（） A.葛根汤 B.桂枝

I really don’t know ________ I put my wallet after I paid the bill.

A．where was it

B．it was where that

C．where it was that

D．where was it that

经过科学家的不懈努力，圆周率已计算到小数1011196691位．把“1011196691”改写成用“亿”作单位的数并保留两位小数是______．

（）控制中继阀的动作。

A、工作风缸

B、均衡风缸

C、总风缸

D、初制风缸

1Pa的声压换算成声压级为多少？