对gateface门面空间进行管理主要是通过（）来实现的。 ["门面浏览器","门面编辑器","门面即时通信","屏幕广播"]
为保证无盲区的完全覆盖，通常使用（）的小区。 ["圆形","椭圆形","扇形","多边形"]
Pistons may be made in （） in order to keep the weight down for balancing purposes at high speed. ["cast iron","forged steel","stainless steel","aluminum alloy"]
Piston No2 of main engine has been removed, and it will be （） by noon tomorrow. ["lifted","reassembled","dismounted","disassembled"]
个人网银数字证书下载到USBKEY中后，可以在（）电脑上使用个人网银证书版。 ["A.1台","B.2台","C.3台","D.安装USBKEY驱动程序的任意一台"]
简述餐饮企业交易情况分析的内容。
