急性腹膜炎非手术治疗的指征
A．年老休弱，一般情况差
B．病程超过24小时，腹部症状好转
C．原发病灶不明
D．病情复杂
E．中毒症状明显
参考答案：B
----Are you going to buy a camera?
-----Yes. But there are so many kinds that I can’t decide __________ to buy.
A．what
B．which
C．how
D．where
LTE中的链路预算是以（）为覆盖目标来进行的。
