Before the machine is switched on, ensure that no one can _________ when the machine is running.
A: endange
B: endangered
C: Be endangering
D: e endangered
A: endange
B: endangered
C: Be endangering
D: e endangered
举一反三
- Before the machine is switched on, ensure that no one can _________ when the machine is running. A: endanger B: endangered C: Be endangering D: be endangered
- Before the machine is switched on, ensure that no one can _________ when the machine is running.
- Engineers are ( ) to locate the source of the problem. A: endeavored B: endeavoring C: endangered D: endangering
- How can you keep the machine _____when you are away ? A: run B: ran C: running D: being run
- When multiple people operate a machine tool, ( ) A: two people can operate the machine at the same time B: only one person can operate at the same time C: only one person can operate at the same time, and other students can leave the machine to rest D: All of the above are correct