A：速度
B：力
C：路程
D：电场强度
故垒西边，人道是，____。（苏轼《念奴娇·赤壁怀古》）
(____) It's a programme about China.
(____) We've got lots of food.
(____) Thank you for talking to us.
(____) She couldn't read or write.
(____) He didn't have any legs then.
“一国两制”是完成祖国统一大业的基本方针。邓小平提出的“一国两制”中的“两制”是指( )
在一定质量的某Na2SO4溶液中加入足量的BaCl2溶液，所得沉淀质量等于原Na2SO4溶液质量的12，则原Na2SO4溶液中溶质的质量分数接近于（ ）
