题干
22. The April 10, 2010 air crash, with a Russian Tu-145 plane _______ Poland’s president Lech Kaczinsky, his wife and many Polish government and military officials, shocked the whole world.
A：carried
B：being carried
C：carrying
D：to carry
答案(点此获取答案解析）
C
C(g)+D (g)在恒容容器中进行，不能说明该反应已经达到平衡的是