对于金额()元(含)以上或非即时结清的购买物品或服务行为,原则上应签订合同并按合同约定进行款项支付,财务报销应附合同复印件。
A.1万
B.3万
C.5万
D.10万
参考答案:C
影响沉淀池沉淀效果的因素有哪些?
Many people watched the boys()the mountain at that time.
A.climb
B.climbing
C.to climb
D.climbed