题干
_____ you know English is important, you should learn it well.
A：Since
B：For
C：Because of
D：Though
答案(点此获取答案解析）
A
_____ you know English is important, you should learn it well.
A：Since
B：For
C：Because of
D：Though
2NO+O2在体积不变的密闭容器中反应，达到平衡状态的标志是