Are there any________ on the farm? Yes, there are some.
A:sheep
B:chicken
C:horse
读中国地势三级阶梯示意图(图1),完成下列问题.
A. I spent two hours there.
B. He is Yang Liwei.
C. I went to my friend's house.
D. I was born in 2004.
E. No, I didn't.
用适当的化学用语填空:
(1)氟元素: ____;
(2)2个镁离子: ____;
(3)碘酒中的溶剂: ____;
(4)胃液中含有的酸: ____.