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
，
的图像与直线
的两个相邻交点的距离等于
，则
的单调递增区间是
H3O++PO43-，欲使溶液中