在顶升飞机之前，确保飞机的稳定性。
A: Make sure that the aircraft is stable before you lift it with jacks.
B: Make sure that the aircraft settles before you lift it with jacks.
C: Before jacking up aircraft make sure that aircraft stability is ensured.
D: Before jacking up aircraft make sure that aircraft stabilization is ensured.
A: Make sure that the aircraft is stable before you lift it with jacks.
B: Make sure that the aircraft settles before you lift it with jacks.
C: Before jacking up aircraft make sure that aircraft stability is ensured.
D: Before jacking up aircraft make sure that aircraft stabilization is ensured.
举一反三
- 举起板子之前，确保它是安全的。 A: Make sure that the platform is safe before you lift it. B: Make sure the platform is secure before raising it.
- ______ before you leave the lab. A: Make sure that the windows are shut B: To make sure that the windows are shut C: Making sure to shut the windows D: To be sure to shut the windows
- Before you travel to America, make sure your passport is( ).
- Before leaving the city, be sure to make __________ for a shopping trip. A: time B: tea C: sure D: up
- 12. Before leaving the city, be sure to make __________ for a shopping trip. A: time B: tea C: sure D: up