______ he like the English corner?
A．Does
B．Do
C．Is
D．Are
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目前所知，遗留人类化石残骸最多的是[ ]
A．元谋人
B．北京人
C．爪哇人
D．蓝田人
水处理用石英砂滤料的密度不应小于（）g/cm3（CJ24•1—88）。
A.1.95
B.2.15
C.2，05
D.2.55
某男，25岁，2周前有感冒近3天出现心悸，气促。心率120次/min，心尖区第一心音减弱，有奔马律。有心尖区收缩期吹风样杂音Ⅱ级
其治疗原则不正确的是
A．营养心肌
B．补充营养
C．加强锻炼，增强体质
D．治疗并发症
E．早期不主张使用糖皮质激素
导致染色体结构异常（染色体畸变）的原因是（）
A.DNA与蛋白质交联
B.纺锤体结构和功能异常
C.DNA链的碱基异常
D.DNA链断裂和异位重接
E.DNA链断裂和原位重接
In the following passage, there are 20 blanks representing the words that are missing from the context. You are to put back in each of the blanks the missing word． The time for this section is 20 minutes.
Where do you really come from And how did you get (1) where you live today DNA studies suggest that all humans today (2) from a group of African ancestors who—about 60,000 years ago— (3) a remarkable journey.
The Genographic Project is seeking to chart new (4) about the migratory history of the human species by (5) sophisticated laboratory and computer analysis of DNA contributed by hundreds of (6) of people from around the world． In this unprecedented and real-time (7) effort, the Genographic Project is closing the gaps of what science (8) today about mankind’s ancient migration stories.
The Genographic Project is a five-year (9) partnership led by National Geographic Explorer-in-Residence Dr. Spencer Wells. Dr. (10) and a team of renowned international scientists and IBM researchers, are (11) cutting-edge genetic and computational technologies to analyze historical patterns in DNA (12) participants around the world to better understand our human genetic roots. (13) three components of the project are: to gather field research data (14) collaboration with indigenous and traditional peoples around the world; to invite (15) general public to join the project by purchasing a Genographic Project Public Participation Kit; (16) to use proceeds from Genographic Public Participation Kit sales to further (17) research and the Genographic Legacy Fund which in (18) supports indigenous conservation and revitalization projects. The Project is anonymous, non-medical, (19) , non-profit and non-commercial and all results will be placed in the (20) domain following scientific peer publication.