问题
单项选择题
碎煤机开机后机体无明显振动,振动值不应超过()。
A、0.1mm;
B、0.2mm;
C、0.3mm;
D、0.4mm。
答案
参考答案:A
碎煤机开机后机体无明显振动,振动值不应超过()。
A、0.1mm;
B、0.2mm;
C、0.3mm;
D、0.4mm。
参考答案:A
从方框中选出五个合适的句子补全对话。 | |
Alice: 1. Dong: Did you smell smoke? Alice: 2. Dong: Where was she? Alice: She was playing in the gym. Dong: 3. Alice: He was eating lunch in the cafeteria. 4. Dong: When the fire started, I was talking on the telephone. Alice: What did you do? Dong: 5. Alice: Good for you! |