反映涂膜力学性能的指标有（）
A、硬度
B、粘度
C、柔韧性
D、耐磨性
参考答案：A, C, D
句型转换。
1. He is ready for the Christmas. (改为同义句)
He is for the Christmas.
2. He didn't come here because he was ill. (就画线部分提问)
he come here?
3. Jenny eats jam every morning. (用 tomorrow morning替换every morning)
Jenny is eat jam tomorrow morning.
何谓多尿？少尿？无尿？
