石家庄市人民政府于1998年颁布了《石家庄市保护中小学校教育环境管理办法》,该《办法》属于()
A.卫生行政规章
B.卫生行政法规
C.地方性卫生规章
D.地方性卫生法规
参考答案:D
双曲线8kx2-ky2=8的一个焦点是(0,3),那么k的值为
— The terrible accident is under investigation.
— Actually,quicker action ____ those workers trapped in the mine.[ ]
A. might have saved
B. must have saved
C. ought to have saved
D. should have saved