Itis____thatstrongvibrationsmadeloudsoundsandweakvibrationsmakesoftsounds.
A: vital
B: evident
C: essential
D: frank
A: vital
B: evident
C: essential
D: frank
举一反三
- essential/vital/significant
- Itis（）formarinerstocombinetheSARTwithafloat-freesatelliteEPIRB. A: essential B: compulsory C: optional D: inadvisable
- Inorderto(attain)ourobjective,itis(essential)thatwe(willmake)thebestuseofthelimitedresources(available). A: attain B: essential C: willmake D: available
- Good financial accounts are vital to the success of any enterprise. A: total B: stable C: essential D: able
- Water<br/>is ____to plants. 植物的基本构成是水。 A: essential B: vital C: critical D: indispensable