由于( )的光色好、显色性好、经济实用,故可以用于施工现场照明或工业厂房整体照明。 发布时间:2018-01-12 14:32 │ 来源:www.tikuol.com 题型:单项选择题 问题: 由于( )的光色好、显色性好、经济实用,故可以用于施工现场照明或工业厂房整体照明。A.高压钠灯B.低压钠灯C.外镇流式高压水银灯D.自镇流高压汞灯
题型:单项选择题 从-1,0,1,2这四个数中选三个不同的数作为函数f(x)=ax2+bx+c的系数,可组成不同的二次函数共有______个,其中不同的偶函数共有______个.(用数字作答) 查看答案
题型:单项选择题 短文改错此题要求改正所给短文中的错误,对标有题号的每一行做出判断:如有错误(每行只有一个错误),则按下列情况改正:该行多一个词把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。该行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。注意:原行没有错的不要改。I like Physical education and that’s probable my favorite subject. Usually when the class come , I have a strong desire to go outside and I think PE class is really good enjoyment. I like to go out to exercise, or after exercising I can study more better because I can concentrate easily but I will feel better. My mind will be more alert(灵活的).Some of my classmate don’t want to have PE class. They think it is a waste of time and do lessons is what we want to do in PE class. It does great harm to both their healthy and their study. I think PE class is a good balance to purely mental science subjects.1. _____2. _____3. _____4. ______5. ______6. ______7. _____8. _____9._____10. ______ 查看答案
题型:单项选择题 某技术方案建设期3年,生产经营期15年,建设投资5500万元,流动资金500万元。建设期第1年初贷款2000万元,年利率8%,贷款期限5年,每年复利息一次,到期一次还本付息,该项目的总投资为()万元。A.6029 B.6800 C.6599 D.6939 查看答案