火力发电厂排出的烟气会造成大气的污染，其主要污染物是（） ["二氧化硫","粉尘","氮氧化物"]
会计的6个要素是（）、负债、（）、所有者权益、费用和利润。
You are designing a forest structure to meet the business and technical requirements. How many forests should you create？（） [" One"," Two"," Three"," Four"]
You have a computer that runs Windows XP Professional. You download new video card driver from the Internet, and then install the driver. You restart the computer. You discover that the newly loaded video driver is named VgaSave. You need to restore the previous version of the video card driver.What should you do?（） ["From the Device Manger, scan for hardware changes. ","From the Device Manager, access the video card properties, and then select Roll Back. ","From the Device Manager, access the VgaSave properties, and then run the Hardware Troubleshooter. ","Restart the computer. From the Advanced Startup Options menu, select Last Known Good Configuration.&e"]
国家助学贷款面向在校的全日制高等学校经济确实困难的（）。 ["高职学生","本科生","博士生","在职研究生","第二学士学位学生"]
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