测验有个质量指标问题。测验是否测出了它所要测出的东西，达到测验目的的程度，这是指测验的（ ）。
A．信度
B．效度
C．难度
D．区分度
参考答案：B
我给句子排排队。
1. Where are they?
2. Nice to meet you.
3. This is my mother. She's a teacher.
4. Come and meet my family.
5. They are in the kitchen.
6. Nice to meet you, too.
7. What would you like?
8. I'd like an apple.
正确的顺序:
下列关于涂料具有显著特点是( )。
A．有利于基层形状不规则部位的施工B．抵抗变形能力强C．施工时不需加热D．使用时间长
