祛风湿,强筋骨,补肝肾,安胎的药物是
A.陶弘景 B.赵学敏 C.李时珍 D.唐慎微 E.苏敬
参考答案:A
Jim was born on a farm, _____, he knows little about farming.
A.thus
B.and
C.yet
D.otherwise
工业上以CaO和HNO3为原料制备Ca(NO3)2·4H2O晶体。为了确保制备过程中既不补充水,也无多余水分,所用硝酸溶液溶质的质量分数应为[ ]
A.30%
B.63%
C.70%
D.无法确定