各支行（营业部）审批时限：对账户开立申请的审批，原则上应在（）个工作日办理完毕。
A.1
B.2
C.3
D.4
参考答案：B
I have _____ chores to do today that I can't go out with you. [ ]
A. so much
B. such many
C. so many
D. such
铜精矿品位偏低的原因有哪些？
