A:烧碱、液态氧、碘酒
B:生石灰、白磷、熟石灰
C:干冰、铁、氯化氢
D:空气、氮气、胆矾
在实验室里,可用同一套仪器制取的气体是( )
﹣0.5﹣13﹣(16+2.5﹣0.3)等于( )
When you feel helpless and _______, just remember you are not _____ in the world because your friends are around you, including me.