Thetheoryofblackholesinspace__(accept)bymanyseriousscientistsandastronomers.
Theblackwriterwantedtheothermembersoftheworkshoptotreat_________asanequal.
当一个带电导体达到静电平衡时()
两列机械波I、II在传播过程中遇到一障碍物,I的波长与障碍物尺寸相当,II的波长远小于障碍物尺寸,则机械波()
Thereisnopoint______takingFrenchlessonsifyoudontwanttolearnthelanguage.