隐性感染的特点是
A.病原体完全被清除B.病原体经常排出体外C.病原体潜藏在组织中D.病原体未引起组织损伤但引起免疫反应E.病原体引起免疫反应,并发生明显的组织损伤
参考答案:D
进境种苗所带的栽培介质需要审批。土壤不属于栽培介质。 ( )
Though it was noisy here,he reading. [ ]
A.got on
B.carried out
C.went on with
D.carried on