A:金属活动性顺序是a>b>c
B:a、b、c分别是铝、镁、铁
C:生成物中金属元素的化合价是a>b>c
D:金属的相对原子质量是a<b<c
选择合适的句子,补全对话。(有两项是多余的)
A. What did you do yesterday?
B. Where did you go yesterday?
C. How many children were there at the party?
D. Yes, he did.
E. Why did you visit Mike?
F. No, they weren't.
G. How many children are there at the party?
A:Hello, Liu Yun. ____
B:I visited Mike.
A:____
B:Because it was his birthday yesterday.
A:Did he have a birthday party?
B:____
B:There were fifteen children at the party.
A:Were Mike's parents at home?
2008年北京奥运会的“祥云”火炬质量仅为985克,火炬受到的重力是____ N;火炬在燃烧过程中化学能转化为____ 能.(g=10N/kg)
He lost his bag. Luckily there isn't anything ____ (value) in it.
My father is a policeman. He in that station since 2008.