已知等比数列{an}的公比为q(q为实数),前n项和为Sn,且S3、S9、S6成 发布时间:2017-05-01 03:07 │ 来源:www.tikuol.com 题型:选择题 问题: 已知等比数列{an}的公比为q(q为实数),前n项和为Sn,且S3、S9、S6成等差数列,则q3等于( )A.1B.-12C.-1或12D.1或-12
题型:选择题 完形填空。 One day, Peter went to see his doctor . "I am always tired when I 1 in the morning." he said. "Do you sleep well?" the doctor asked. "Well, not 2 . I dream so much. I have being like this for a long time." Peteranswered. "Well, sometimes dreaming is good 3 us," said the doctor. "Maybe," Peter said. "But my trouble is 4 I always dream about hard work! Last night, as soon as I fell 5 , I dreamt that I went to the 6 to plant trees all night long! Then several nights ago, I dreamt that I was on an old 7 in a terrible storm at sea. We had to work for hours to stop the ship from sinking. It seems that, in my dreams I always have very difficult jobs to do." "What about the sleeping 8 that were given to you several days ago? Don't they work?" the doctor asked. "Yes, but not well. But if I don't take one, I will be awake all night." "Then try 9 before you go to sleep. 10 , listen to light music." the doctor said. ( )1. A. wake up ( )2. A. hardly ( )3. A. for ( )4. A. what ( )5. A. sleep ( )6. A. house ( )7. A. ship ( )8. A. pill ( )9. A. relax ( )10. A. By the wayB. go to bed B. suddenly B. of B. that B. sleeping B. garden B. train B. medicine B. to relax B. And so on C. sleep C. really C. with C. how C. asleep C. library C. plane C. pills C. relaxed C. For example 查看答案
题型:选择题 55岁男性,有吸烟史20年,10支/日。劳累性胸痛5年,每次发作持续5~10分钟。休息可缓解。心电图见图17。下列哪些表现是心尖肥厚型心肌病特征性心电图表现()A.左室低电压B.左室高电压C.V3、V4导联倒置T波D.V3、V4导联ST段抬高E.V4~V6ST段压低F.偶发房早G.SⅡQⅢTⅢ 查看答案
题型:选择题 甲、乙同为儿童玩具生产商。“六一”节前夕,丙与甲商谈进货事宜。乙知道后向丙提出更优惠条件,并指使丁假借订货与甲接洽,报价高于丙以阻止甲与丙签约。丙经比较与乙签约,丁随即终止与甲的谈判,甲因此遭受损失。对此,下列说法正确的是( )A.乙应对甲承担缔约过失责任B.丙应对甲承担缔约过失责任C.丁应对甲承担缔约过失责任D.乙、丙、丁无须对甲承担缔约过失责任 查看答案