划分我国四大地理区域的依据是[ ]
A、季风区和非季风区的分界线
B、各地地理位置、自然和人文地理特征
C、一月份0℃等温线的分布
D、多年平均降水量分布
答案:B
在工业生产中,接触煤焦油、沥青、蒽、木馏油、页岩油、石蜡能引起()
A.肺癌
B.肝癌
C.膀胱癌
D.皮肤癌
E.白血病
The Customs shall reply in writing within ______ from the date of receipt of the application for the refund of the duty paid and notify the applicant of its decision.
A.one month B.two monthsC.three monthsD.six months