承压型高强度螺栓可用于 ( )。
D
暂无解析
They________extensiveandpossiblydangerousactualflighttraining.
Chinaisamountainouscountry.Hills,mountains,andplateauscover_______ofthetotalarea.
TheultimategoaloflearningaforeignlanguageinaGrammar-Translationclassroomistoenablethestudentsto______itsliterature.
Awell-knownexampleofthelargescaledestructionofanecosystemthroughvegetationremovaltoaccommodatetouristfacilitiesisthecaseofthe_______.
_______atallisworthdoingwell.