按现行规定，建筑工程安装工程费中，住房公积金属于（）。 A.直接费 B.间接费 C.

带电作业工具使用前应使用500V及以上兆欧表或绝缘检测仪进行分段绝缘检测。

XYZ, Inc. has entered into a "plain-vanilla" interest rate swap on $ 5000000 notional principal. XYZ company pays a fixed rate of 8.5% on payments that occur at 180-day intervals. Platteville Investments, a swap broker, negotiates with another firm, SSP, to take the receive-fixed side of the swap. The floating rate payment is based on LIBOR (currently at 7.2% ). At the time of the next payment (due in exactly 180 days), XYZ company will: （）

A. pay the dealer net payments of $ 65000.

B. pay the dealer net payments of $ 32500. 

C. receive net payments of $ 32500.

如果要打开“剪贴画”窗格，则首先应执行的操作是打开（）。

A.“文件”选项卡

B.“开始”选项卡

C.“插入”选项卡

D.“视图”选项卡

设随机变量列X₁，X₂…，X_n，…相互独立且同分布，则X₁，X₂…，X_n，…服从辛钦大数定律，只要随机变量X₁______．

积分饱和现象（）。