预防接种效果与哪些因素有密切关系？
参考答案：
与接种起始时间、接种间隔、接种途径、接种剂量等均有密切关系。
The melon the Smiths served at dinner would have tasted ________ if it had been put in the fridge for a little while.
A．good
B．better
C．best
D．well
为盆栽花卉施（）能补充土壤基肥的不足，满足花卉不同生长发育期的特殊要求。
A.基肥
B.种肥
C.追肥
D.根外追肥
