下列计算正确的是 [ ]
A.a·a3=a3
B.a2·a3=a6
C.(a2)3=a5
D.a5+a5=2a5
答案:D
.
To deal with the global financial crisis, China ______ the international community to help developing countries.
A.called on
B.called up
C.called in
D.called for
案件审理部门主要受理哪些违反政纪的案件?