下列实验操作正确的是（ ）
A．
稀释浓硫酸
B．
蒸发食盐水
C．
套橡胶管
D．
测溶液pH
答案：C
请看图将下列句子补充完整，注意冠词的使用。
1. What's this? It's ________________.
2. What's this? It's ________________.
3. What's that? It's ________________.
4. What's that? It's ________________.
5. What's that? It's ________________.
替换功能用于______指定的内容。
A．快速查找
B．快速查找并替换
C．替换
D．复制
