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【简答题】
World Book Day falls on April 23 every year. It was set up by UNESCO (联合国教科文组织) in 1955 to encourage people, especially teenagers, to discover the pleasure of . Many countries celebrate World Book Day. World Book Day is also celebrated in China. Reading can benefit people . Reading helps us become more knowledgeable and more intelligent. Reading helps us to follow the developments of science and technology. Reading us with information about other culture and places of the world. When we read, we may find many things are unfamiliar to us. We would have to use our brain about them or do more reading to find out the answers. The more we read, the more we know. The more we know, the we become. Reading is also one of the most important ways to learn a foreign language English. We all know that we learn everything at school, for example, the ways English people are speaking and writing today. “Reading makes a full man.”Books, magazines, newspapers and other kinds of reading materials can help to know more about the outside world and perfect us. , it is necessary for us to form the habit of reading every day. 小题1: A.listening B.Speaking C.Reading D.writing 小题2: A.in many ways B.by the way C.in any way D.in the way 小题3: A.Earlier B.Later C.Latest D.last 小题4: A.Shares B.Gets C.Opens D.provides 小题5: A.Those B.that C.Where D.how 小题6: A.Think B.to think C.Talk D.to talk 小题7: A.Outstanding B.prettier C.Smarter D.outgoing 小题8: A.Like B.at C.About D.towards 小题9: A.Can B.can’t C.Might D.have to 小题10: A.So B.However C.Now that D.Therefore
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【单选题】Coral(珊瑚) is not a plant but a variety of animal life ________ and bright colors.
A.
in different shapes
B.
in a different shape
C.
of different shapes
D.
of a different shape
【单选题】PCR实验延伸温度一般是
A.
94度
B.
60度
C.
72度
D.
55度
【简答题】PCR引物延伸温度一般为
【单选题】PCR延伸温度一般为
A.
55℃
B.
72℃
C.
94℃~97℃
D.
低于引物Tm5℃左右
【单选题】How do fireworks produce their colors? Chemicals that give off bright, distinct colors when burned provide the spectacular colors associated with fireworks. Charcoal and iron, for instance, burn brill...
A.
shells that are put in a launcher
B.
heavenly bodies in the sky
C.
brilliant colors produced by fireworks
D.
compressed chemical powder
【简答题】Bright colors make people happier. They also make people more active.
【简答题】A.94 °C B.85 °C C.50 °C D.72 °C E.100 °C 10.PCR 变性温度一般为:( ) 11.PCR 退火温度一般为:( ) 12.PCR 延伸温度一般为:( )
【单选题】PCR 实验延伸温度一般是
A.
90 ℃
B.
72 ℃
C.
80 ℃
D.
95 ℃
E.
60 ℃
【单选题】(3)The bright colors can make a small room _________ much bigger.
A.
arise
B.
arrange
C.
notice
D.
appear
【简答题】PCR引物延伸温度一般为 查看材料
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