知道哪几个参数之后就可以确定行星轨道面()?
A、i,Ω,e
B、a,Ω,e
C、i,Ω,w
D、i,a,e
参考答案:C
病毒性心肌炎最常见的致病病毒是()
A.腺病毒
B.柯萨奇病毒B组
C.脊髓灰白质炎病毒
D.乙肝病毒
E.水痘病毒
---Amy had nothing for breakfast, _________ she?
---_______. She had some bread and milk.
A.had; Yes
B.had: No
C.did; Yes
D.did; No