一组对边平行,并且对角线互相垂直且相等的四边形是[ ]
A.菱形或矩形
B. 正方形或等腰梯形
C. 矩形或等腰梯形
D. 菱形或直角梯形
B
China has been considering raising the retirement age since 2008 to ________ its shrinking workforce and aging society.
A.set off
B.put off
C.bring about
D.cope with
()负责全国工程监理企业资质的归口管理工作。
A.国务院建设行政主管部门
B.国务院
C.国家发展与改革委员会
D.工商行政管理部门