A与A、B之和的比是3：8，则A与B的比是______．
因为A：（A+B）=3：8，
所以，5A=3B，
则A：B=3：5．
故答案为：3：5．
______ about wild plants that they decided to make a trip to Madagascar for further research . [ ]
A. so curious the couple was
B. So curious were the couple
C. How curious the couple were
D. The couple was such curious
按照信息的稳定性进行分类（）。
A.固定信息和流动信息
B.外源信息和内源信息
C.突发信息
D.经济信息、政治信息
E.精确性信息
