题型：问答题 已知数列{an}是等比数列，首项a1=2，a4=16（Ⅰ）求数列{an}的通项公式；（Ⅱ）若数列{bn}是等差数列，且b3=a3，b5=a5，求数列{bn}的通项公式及前n项的和． 查看答案
题型：问答题 (6分)在如图所示的电路中，电源电压为9V且保持不变，电流表的规格为“O～O．6A”，电压表的规格为“0～15V”，灯泡上标有“6V 6W”字样，灯泡中的电流随电压变化的关系如图所示．试求：(1)灯泡正常发光时的电阻．(2)当电流表示数为0．4A时，电压表的示数．(3)灯泡正常发光时滑动变阻器消耗的电功率． 查看答案
题型：问答题 完形填空 When I began planning to move to Auckland to study,my mother was worried about a lack of jobs and cultural differences. Ignoring these 1 ,I got there in July 2010.__2__ I arrived,I realized the importance of getting a job __3__ my living expenses.Determined to do this __4__, I spent several weeks going doortodoor for a job, but found __5__ response(回应). One afternoon, I walked into a building to ask __6__there were any job opportunities(机会). The people there advised me not to continue my job search in that __7__.As I was about to __8__, a man who had been listening approached me and asked me to wait outside __9__.Nearly ten minutes later, he 10 .He asked me about my plans and encouraged me to stay 11 . Then he offered to take me to Royal Oak to 12 a job. I was a little surprised, but had a 13 feeling about him. Along the way,I realized that I had 14 resumes(简历). Seeing this, the man 15 at his business partner's office to make me fifteen 116 copies. He also gave me some 17 on dressing and speaking. I handed out my resumes and went home feeling very 18 . The following day, I received a 19 from a store in Royal Oak offering me a job. It seems that the world always 20 to you when you need it.And this time, it was a complete stranger who turned out to be a real blessing.( )1. A. doubts ( )2. A. Even if ( )3. A. of ( )4. A. on my own ( )5. A. any ( )6. A. why ( )7. A. direction ( )8. A. answer ( )9. A. for ever ( )10. A. returned ( )11. A. silent ( )12. A. pick out ( )13. A. dull ( )14. A. made use of ( )15. A. stopped ( )16. A. right ( )17. A. pressures ( )18. A. lonely ( )19. A. call ( )20. A. turns off B. concerns B. Every time B. at B. on my way B. much B. wherever B. attitude B. work B. at any time B. hesitated B. busy B. search for B. good B. taken care of B. knocked B. more B. agreements B. funny B. tip B. goes over C. instructions C. Now that C. for C. by any chance C. some C. whether C. language C. leave C. as usual C. passed C. positive C. take on C. guilty C. run out of C. glanced C. former C. impressions C. disappointed C. present C. gives back D. reasons D. Soon after D. with D. by the day D. little D. whenever D. manner D. refuse D. for a while D. regretted D. comfortable D. give up D. general D. become tired of D. appeared D. different D. suggestions D. satisfied D. report D. looks up 查看答案
题型：问答题 在建设工程招投标活动中，在提交投标文件截止时间后到投标有效期终止之前，下列对有关投标文件处理的表述中，正确的是( )。A．投标人可以替换已提交的投标文件B．投标人可以补充已提交的投标文件C．招标人可以修改已提交的招标文件D．投标人撤回投标文件的，其投标保证金将被没收 查看答案
