1)c(din)ɫ(li)ɫĩo(w)o(w)ζˮв
2) ˎã(du)Nx(chng)x(chng){x(chng)^(qing)(q)
3) m(yng)YţRiݵ(q)x(chng){x(chng)x(chng)
4) ÷c(ni)һÿwR5~10ţ10~15i5~10Ȯ25~5010~20ˡ
5) ע(xing)
A. (yn)
B. a(chn)ˎԡ
C. ڽ
D. ˎţ2810죬a(chn)ڽ
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