凝聚体颗粒相互作用发生于那些凝聚稳定性（）的部位。
A.较强
B.较弱
C.消除
参考答案：C
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
统计整理主要是整理（）。
A.历史统计资料
B.统计分析资料
C.原始调查资料
D.综合统计资料
