答案:A
This is Danny ____________ the train.[ ]
A. of
B. on
C. to
中药半夏粉末,在经过透化后,在显微镜下可见()
A.草酸钙针晶
B.草酸钙簇晶
C.草酸钙方晶
D.草酸钙棱晶