表达序列标签(expressed sequence tag,EST)
参考答案:一组短的cDNA部分序列,由大量随机取出的cDNA克隆一次测序得到的组织或细胞基因组的表达序列标签。
This is a story from a meeting held by some people and two things in nature. We call it the Four-Sided Talk. Let’s “listen to” everyone carefully and find out what they think.
People: We have lived on the earth since ancient times. The earth is our home. Now we regret what we have done to our home!
小题1:What’s the United Nations’ decision in the Four-Sided Talk?
A.Set an Earth Day.
B.Find out what is making the pollution.
C.Hold an international meeting.
D.Protect and love the earth.小题2:What doesn't the old tree tell us?
A.He’s afraid to be cut down some day.
B.The trees have the longest lives in the world.
C.Over-cutting teaches people a lesson.
D.People are destroying the natural environment.小题3:What will people do according to the passage?
① Over-use the resources. ② Beautify the earth.
③ Start a global group. ④ Protect the earth.
A.①④
B.②③
C.①③
D.②④
男性,32岁,饮水后约10余分钟,出现恶心,呕吐物无味道,随后阵发性抽搐,伴意识丧失急诊。查体:呈浅昏迷状态,抽搐发作频繁,发作时发绀,呼吸略促,心率128次/分,BP135/85mmHg,心肺(-)。最可能是()
A.有机磷中毒
B.毒鼠强中毒
C.杀虫脒中毒
D.拟除虫菊酯类农药中毒
E.亚硝酸盐中毒