1965年5月,我国考古学家在云南省某县发现了两颗门齿化石和一些粗糙石器,中国地

题型:选择题

问题:

1965年5月,我国考古学家在云南省某县发现了两颗门齿化石和一些粗糙石器,中国地质科学院用古地磁方法测定它们距今约170万年。这就是我国境内已知的最早人类 [ ]

A、元谋人  

B、北京人   

C、山顶洞人   

D、半坡人

考点:元谋人
题型:选择题

示波器的原理图如图所示.电子经电压为U1的电场加速后,射入电压为U2的偏转电场,离开偏转电场后电子打在荧光屏上的P点,离荧光屏中心O的侧移为y.已知偏转电场极板的长度为L1,两板间的距离为d,荧光屏离极板右端的距离为L2

(1)电子在偏转电场中和离开偏转电场后分别做什么运动?

(2)求电子打到荧光屏上时的侧移y.

题型:选择题

女性,74岁,被确诊支气管肺癌1个月,拒绝西医治疗,请中医诊治。症见:刺激性咳嗽,偶或痰中带血,甚则咯血不止,心烦,少寐,手足心热,盗汗,口渴,大便秘结,舌质红,苔薄黄,脉细数。治疗应首选的方剂是

A.生脉饮

B.血府逐瘀汤

C.导痰汤

D.沙参麦冬汤合五味消毒饮

E.沙参麦冬汤

题型:选择题

蛋白质、脂类、()能够提供机体所需要的热量,故称为三大产热营养素。

A.碳水化合物

B.矿物质

C.维生素

D.水

题型:选择题

第二部分:语言知识及运用(共两节,满分35分)

第一节:完形填空(共10小题;每小题2分, 满分20分)      

阅读下面短文,从各题所给的四个选项A、B、C、D中选出最佳选项。

The guitar is one of the oldest instruments known to man. It   21   originated in the vicinity of (在……附近) China. There were guitars in ancient Egypt and Greece as well, but the   22   history of the guitar started in Spain in the 13th century. By 1500 the guitar was   23   in Italy, France, and Spain. A French document of that time   24   that many people were playing the guitar. Stradivarius, the famous king of violin makers, could not resist   25   a variety of guitars. Also, there was no lack of music written for the instrument. Haydn, Schubert, and others   26   guitar music. When Beethoven was asked to compose music for the guitar, he went into a rage(大怒) and   27  , but eventually even Beethoven could not ignore the   28  .Legend tells us he finally called the guitar a miniature orchestra. Indeed the guitar does   29   like a little orchestra! Perhaps that is why in rural areas around the world the guitar has been a source of   30   for millions to enjoy.

21. A. certainly             B. mainly                     C. probably           D. partly

22. A. written                      B. learned              C. found                D. spoken

23. A. acceptable           B. popular            C. familiar             D. available

24. A. predicted            B. warned              C. denied               D. recorded

25. A. destroying           B. accusing            C. creating             D. following

26. A. enjoyed                     B. wrote                C. accepted            D. commented

27. A. refused               B. accepted            C. failed                D. escaped

28. A. contribution        B. challenge           C. history                     D. suggestion

29. A. look                   B. feel                   C. taste                  D. sound

30. A. intelligence         B. energy                     C. music                D. spirit

题型:选择题

机车柴油机活塞一般采用()冷却。

A.冷却水

B.空气

C.机油

D.冷却水与空气

更多题库