开式站立指的是自己与对手使用相同的实战式站立.
参考答案：错
Lots of rescue workers were working around the clock, _____ supplies to Yushu, Qinghai province after the
earthquake.[ ]
A. sending
B. to send
C. having sent
D. to have sent
A．5A
B．5A
C．3.5A
D．3.5A
