王大伯家养了20只鹅,养鸭的只数是鹅的5倍,养的鸭比鹅多多少只?
20×5-20
=100-20,
=80(只).
答:养的鸭比鹅多80只.
. ---- we will take the conditions into careful consideration ______ you have attached to this contract.
---- Thanks. Wish our future cooperation pleasant.
A.after
B.when
C.what
D.which
何谓药物的半衰期?