两个袋中各装有编号为1,2,3,4,5的5个小球,分别从每个袋中摸出一个小球,所得两球编号数之和小于5的概率为 ▲ .
关于提供劳务收入的确认计量,下列说法中正确的有
A.企业在资产负债表日提供劳务交易的结果能够可靠估计的,应当采用完工百分比法确认提供劳务收入
B.长期为客户提供重复劳务收取的劳务费,在相关劳务活动发生时确认收入
C.企业应当按照从接受劳务方已收或应收的合同或协议价款确定提供劳务收入总额,但已收或应收的合同或协议价款不公允的除外
D.包括在商品售价内可区分的服务费,在销售商品的同时确认收入
The hall ______ for our school Christmas party and everything will soon be ready.
[ ]
A. was decorated
B. was being decorated
C. is being decorated
D. has been decorated