热力学条件有（），变形速度和变形程度。
A、塑性
B、变形抗力
C、屈服点
D、变形温度
参考答案：D
用括号内所给单词的适当形式填空
1. I_______ (drop) the cup on the floor by accident.
2. They are _______ (possible) tired after working so long.
3. He tried many times and ________(final) he succeeded.
4. Fred is afraid of _______(fly). He feels anxious before he gets on the plane.
5. The bicycle must be ________(Carla).
下列对氯气的性质描述错误的有（ ）
A．密度比空气大
B．无色，有剌激性气味
C．能使品红溶液褪色
D．可与消石灰反应制漂白粉
