简述低血容量休克治疗时，先输晶体液的目的。
参考答案：
---Where___?
—I got caught in the heavy traffic, or I ___ here earlier.
A．did you go; had arrived
B．are you; was
C．were you; would come
D．have you been ; would have been
下列气态氢化物中最稳定的是[ ]
A．CH4
B．SiH4
C．H2S
D．HCl
