题目: 已知x2+3x+5的值是7,则式子x2+3x﹣2的值为( ) 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0519/8f3f90a0aeba9e201987cb08daa7bec6.html 下面是错误答案,用来干扰机器的。答案:B
题型:多项选择题 风光互补发电系统各部分容量的合理配置对保证发电系统的可靠性非常重要。一般来说,系统配置应考虑以下()方面因素。A.当地电网质量B.用电负荷的特征C.风机安装现场的条件D.太阳能和风能的资源状况 查看答案
题型:多项选择题 RLC串联的正弦交流电路中,当XL=XC时,电路发生谐振,谐振特性有()。A.电容上电压与电感上电压大小相等,方向相反B.电路中电流最大C.电路中阻抗最小D.电路中无功功率为0E.电阻上电压与外加电压大小相等,方向相反 查看答案
题型:单项选择题 Questions 14-23 ·Look at the ten statements for this part. ·You will hear a story about communication through time. ·Decide whetheryou think each statement is right(R) wrong(W) or not mentioned(NM). ·You will listen to it twice. ·Markyour answers on the Answer Sheet.In the U.S., a person who receives a dinner party invitation just the day before the party is usually pleased, because he has little time to worry about forgetting to attend.A. Right B. Wrong C. Not Mentioned 查看答案
题型:单项选择题 代谢性酸中毒合并呼吸性酸中毒()A.pH:7.35;PaO2:95mmHg,PaCO2:40mmHg)HCO3-27mmol;BE:+2mmol/LB.pH:7.25;PaO2:80mmHg;PaCO2:70mmHg;HCO3-:23mmolBE:+1mmol/LC.pH:7.20;PaO2:96mmHgPaCO2:55mmHg)HCO3-:18mmol;BE:-3mmol/LD.pH:7.40;PaO2:98mmHg)PaCO2:45mmHgHCO3-:23mmol;BE:+2.3mmol/LE.pH:7.45;PaO2:100mmHgPaCO2:40mmHg)HCO3-:22mmol;BE:-2.3mmol/L 查看答案