钢丝绳芯带式输送机应设()保护。
A、制动
B、过载
C、断带
参考答案:C
Make sentences with the words. 组词成句。
1. one minus is five four (.)
2. time is it what (?)
3. you apples bring can me two (?)
4. lamp on the desk the is (.)
热塑性粉末涂料,和热固性粉末涂料的区别()
A、成膜原理
B、应用范围
C、涂膜耐热性
D、涂膜外观