梅罗维茨提出什么媒介能促成原来不同情境的合并（）.
A.印刷媒介
B.网络媒介
C.广播媒介
D.影视媒介
参考答案：B
根据汉语意思，用单词的适当形式完成句子。
1. The box is too heavy for the little boy to _____ (搬动).
2. If I have much money, I will take my parents to _____ (旅行) around the world.
3. —Do you know the young _____ (女士) over there?
—Yes. She is our new English teacher.
4. She'd like to have a job in a _____ (外国的) country.
5. They _____ (建造) a road to the town last year.
下列化学用语书写正确的是（ ）
A．氯化钙：CaCl
B．二氧化硫中硫元素显+4价：
C．2个氢分子：2H
D．镁离子：Mg+2
