对开放性骨折病人急救时应（）.
A、将暴露伤口外的骨纳回伤口内
B、先止血后固
C、安慰病人
参考答案：B
主动脉球囊反搏（1ABP）辅助期间，维持ACT的最佳值（）
A.150～200秒
B.200～250秒
C.>250秒
D.100～150秒
E.<100秒
______ the traffic jam, he didn’t catch his plane, which was reported to have crashed soon after it took off.
A．Because of
B．On account of
C．Due to
D．Thanks to
