长江沿江地带指长江流域中从______(城市)至川西______(城市)的狭长地带.
长江沿江地带指长江流域中从上海至川西攀枝花的狭长地带,
故答案为:上海;攀枝花.
Whenever I met her, __________ was very often, she greeted me with a sweet smile.
A.who
B.which
C.when
D.since
有研究表明,土壤酸性越强,烟叶中镉、铅含量越低,下面4个不同pH土壤种植的烟叶中镉、铅含量最低是
A.pH = 5.3
B.pH = 5.8
C.pH = 6.5
D.pH = 7.3