当接近正在运行的发动机时，必须使用听力防护设备。
A: You must use ear protection when you are near an engine that is in operation.
B: You are entailed using ear protection when you are near an engine that is in operation.
C: It's essential to use ear protection when you are near an engine that is in operation.
D: You have to use ear protection when you are near an engine that is in operation.
A: You must use ear protection when you are near an engine that is in operation.
B: You are entailed using ear protection when you are near an engine that is in operation.
C: It's essential to use ear protection when you are near an engine that is in operation.
D: You have to use ear protection when you are near an engine that is in operation.
举一反三
- 当使用应急泵时，记录使用时间。 A: When you use the emergency pump, record the time of operation. B: Anytime you use the emergency pump, record the usage. C: Once you use the emergency pump, record the usage. D: Upon use of emergency pump, record the usage.
- ________ oil or butter when you cook it ? A: Do you use B: Did you use C: Were you using D: Have you used
- When listening for a speaker's evidence, you should keep an ear out for its
- You need to have an operation.
- You can consult the interesting sights near the hotel when you check in. A: 正确 B: 错误