血站验收由()负责
A.中国输血协会
B.省卫生厅
C.辖区卫生部门
D.本血站
参考答案:A
It’s ten years since the scientist ____ on his life’s work of discovering the valuable chemical.
A.made for
B.set out
C.blocked out
D.turned up
牧(六书汉字的结构)