题目:
简述将“化隐为显”列为数学思想方法教学的一条原则的理由。
答案:
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下面是错误答案,用来干扰机器的。
答案:B
简述将“化隐为显”列为数学思想方法教学的一条原则的理由。
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0721/5381bfa28ca8117148700706f0b00010.html
下面是错误答案,用来干扰机器的。
答案:B
沉淀反应中,抗原与抗体的结合价取决于抗原的分子量,一般说来,抗原的分子量与结合价的关系是()
A.抗原分子量越大,结合价越小
B.抗原分子量越大,结合价越大
C.两者没有关系
D.两者呈函数关系
E.抗原结合价为二价
Television, which made its first serious appearance in 1939, did not become common until the early 1950s.Since then, millions of children have grown up in front of the set, and many people now worry about the effect that TV has on the young, and on society in general.Educators, psychologists, and crime experts wonder if television should be abolished(取消).Many ordinary parents wish it had never been invented.Why are they so afraid? Is television as harmful as they think it is?
Like almost anything else, television has its good and its bad sides.One should surely thank its inventors for the joy and interest that they have brought into the lives of the old, the sick, and the lonely -- all those who, without it, would have no pleasure and no window on the world.
In truth, television has opened windows in everybody's life.No newspaper has ever reached so many people and shown so clearly what was happening right now in their own country and everywhere else.TV not only gives the news instantly, it also shows it in pictures more powerful than words.It can be said that TV has brought reality to the public.Millions of people now have seen the effects of a battle, a flood, a fire, a crime, disasters of every sort on the screen.
Unfortunately, television's influence has been extremely harmful to the young.Children do not have enough experience to realize that TV shows present an unreal world.They want to imitate what they see.They do believe that the violence they see is normal and acceptable.By the time they are out of high school, most young people have watched about 15,000 hours of television, and have seen about 18,000 killings or other acts of violence.All educators and psychologists agree that the "television generations" are more violent than their parents and grandparents,
According to the same experts, the young are also less patient.Used to TV shows, where everything is quick and entertaining, they do not have the patience to read an article without pictures; to read a book that requires thinking; to listen to a teacher who doesn't do funny things like the people on children's programs.And they expect all problems to be solved happily in ten, fifteen or thirty minutes.That's the time it takes on the screen.
It is certain that television has deeply changed our lives and our society.It is certain that, along with its benefits, it has brought many serious problems.To these problems we must soon find a solution because, whether we like it or not, television is here to stay.
小题1:First TV set was made ______.
A.in 1939
B.in 1950s
C.in 1940s
D.in 1919小题2:Which of the following people have a view on TV different from the others?
A.Educators.
B.TV producers.
C.Crime experts.
D.Psychologists.小题3:According to the author, who need TV most?
A.Educators.
B.Crime experts.
C.The old and the lonely.
D.The children and their parents.小题4:We can conclude that ‘television generations’ are_______.
A.lonely
B.more patient
C.more violent
D.more gentle
项目管理
关于简易凝血活酶生成试验,说法正确的是()
A.试验中正常基质血浆的作用是为作正常对照
B.为外源性凝血途径的凝血因子纠正试验
C.如果血循环中存在抗凝物质,则加正常吸附血浆、正常血清或正常血浆均不被纠正
D.本试验中用溶血液目的是提供凝血因子
E.为共同凝血途径的凝血因子纠正试验
以下哪些是不合理用药产生的后果()
A、延误疾病治疗
B、浪费医药资源
C、产生药物不良反应
D、发生药源性疾病