一个长方形的枕套，长5分米，宽3分米，给它的四周缝上花边，至少需要多少分米的花边？
（5+3）×2
=8×2
=16（分米）
答：需要花边16分米．
简述石榴子石拼合石的鉴别。
The traffic police stopped three trucks heavily loading with merchandise that looked as grain bags.
A．that were loading ... like
B．loaded with ... like
C．to load with ... for
D．loaded with ... for
