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【简答题】
Most students have biology classes in the classrooms or the labs in China.But several days ago,I had a biology class outside in my American schoo1. My biology teacher,Mr.Kwak,divided us into three groups and asked us to play a game about natural selection(选择)and how birds find food. He gave the first group one spoon per person,the second group forks and my group'knives.I thought we were going hunting,so knives might work better.Surprisingly,he told us to pick up the beans on the grass with our tools. When the game started all of us ran to the grass area.We squatted(蹲)down and looked for beans.It was hard to pick up something that small,especially from the grass . When I almost fired a bean,it dropped back to the ground.When I finally picked up several beans.one of my friends ran into me.I couldn’t keep my balance and fell over.All my beans dropped to the ground!Just at that moment,Mr.Kwak called us back.I had to leave the game and of course I got a bad result.I couldn’t help thinking that if I were a bird living on Galapagos Island,I would be dead soon. The fun game made me realize that natural selection is redly competitive(竞争的).Everyone is trying his or her best to— survive . 小题1:What did the writer’s group use to pick up the beans? A.Spoons. B.Forks. C.Knives. D.Hands. 小题2:How many beans did the writer get at last? A.None. B.One. C.Several. D.Many. 小题3:Which of the following is TRUE? A.The writer did a good job in the biology class. B.The writer had a biology class outside their schoo1. C.The writer found that picking up the beans from the grass was hard. D.The writer didn’t find enough food for the birds on Galapagos Island. 小题4:What’s the meaning of the underlined word“survive’’in the last paragraph? A.Find food. B.Remain alive. C.Be lovely. D.Keep balanced. 小题5:What was the aim of Mr.Kwak’s class? A.To play an interesting game. B.To pick up the beans. C.To know different kinds of birds. D.To learn natural selection.
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【多选题】勒脚有哪些作用()
A.
保护墙体防止各种机械性碰撞
B.
没有意义
C.
防止地表水对墙脚的侵蚀
D.
美观的作用
【简答题】勒脚的作用有哪些?
【单选题】有机磷农药中毒的原因是()
A.
与乙酰胆碱争夺M型受体
B.
与乙酰胆碱争夺N型受体
C.
抑制胆碱脂酶的活性
D.
抑制乙酰胆碱的作用
E.
激动N受体
【单选题】有机磷农药中毒死亡的原因是()
A.
休克
B.
肝昏迷
C.
呼吸中枢麻痹
D.
心脏衰竭
E.
肾脏衰竭
【单选题】有机磷农药中毒的原因是()
A.
与乙酰胆碱争夺M型受体
B.
与乙酰胆碱争夺N型受体
C.
抑制胆碱酯酶的活性
D.
抑制乙酰胆碱的作用
E.
激动N受体
【简答题】勒脚的作用有哪些?
【判断题】自然张开的手这个动作手部用力大不,手指自然展开,微微弯曲,手指与手指的之间没距离()
A.
正确
B.
错误
【简答题】勒脚的作用有哪些?其材料做法常用有哪几种?
【单选题】Tracert 诊断工具记录下每一个 ICMP TTL超时消息的( ),从而可以向用户提供报文到达目的地所经过的 IP地址。(单选)
A.
目的端口
B.
源端口
C.
目的IP地址
D.
源IP地址
【单选题】有机磷农药中毒的原因是,导致 骨骼肌 神经 —肌接头 处的
A.
乙酰胆碱释放增加
B.
乙酰胆碱水解加速
C.
胆碱酯酶活性增高
D.
胆碱酯酶活性降低
E.
乙酰胆碱受体功能变异
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