题干
They succeeded in killing pests which came from the foreign countries ______ a lot of hard work.
A：according to
B：thanks to
C：in memory of
D：in addition of
答案(点此获取答案解析）
B
bB（g）达平衡后，保持温度不变，将容器体积增加一倍，当达到新的平衡时，B的浓度是原来的60%，则（ ）
