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【简答题】
You may never connect the words “good” and “eco-friendly”with plastic.It’s time to do a rethink on that as we say hello to hemp(大麻)plastic.Traditionally,plastics have been made from petrochemicals,which are mainly poisonous.Plants,on the other hand,are also a source of cellulose(纤维素),which can be used to make biodegradable (生物所能分解的)plastic.As hemp happens to be one of the richest sources of cellulose,it is only natural that scientists will support its use,considering its ecological benefits. Hemp plastic is biodegradable and recyclable.If you thought being eco-friendly reduced its solidity,you couldn’t be more wrong.The hard level of hemp plastic can match that of regular plastic.Hemp plastic is resistant to heat;however,the most outstanding feature of a few varieties of hemp plastic is that they are flame resistant too.Finally,if Henry Ford could imagine creating a car with this material,we can perhaps believe that it indeed is“ten times stronger than steel”. It is a pity that with so many useful qualities,we don’t see hemp plastic being used in our everyday life,the way it ought to be.Hemp plastic can easily take the place of the exiting plastic in products like cell phone chargers(充电器),laptop covers,etc.Currently,hemp plastic is being used to produce audio(音响设备),video,toys,automobile parts and packaging materials. Hemp fiber is one of the strongest natural fibers known to us.As scientists keep looking for ways to solve the ecological damage that traditional plastics have caused,here is a material that can be produced to be 100% biodegradable.Hemp plastic is known to be several times durable as compared to polypropylene(聚丙烯)plastic,and it comes without all the health and safety threats,It really has long useful life. Plastics keep reminding us of the damage that we have done to our planet,all under the excuse of convenience.As hemp products have become a new choice into our daily life,Please take a green plan now and make your effort to protect the environment. 小题1:Plastics produced in the traditional way are______. A.harmful B.made from plants C.good and eco-friendly D.biodegradable 小题2:According to Para.2,hemp plastic_____. A.is all resistant to flame B.doesn’t have enough solidity C.will take the place of steel D.can be used again after being processed 小题3:What does the underlined word“durable”mean in Para.4? A.Very useful of important. B.Costing little money or less money. C.Staying in good condition for a long time. D.Existing in large numbers or in many places. 小题4:Which aspect of hemp plastic isn’t mentioned in the passage? A.Features. B.Production cost C.Applications. D.Advantages. 小题5:What can we know from the passage? A.Using hemp plastic is inconvenient. B.People haven’t made the most of hemp. C.Hemp fiber is a kind of strong man-made fiber. D.Scientists have already known how to solve ecological damage.
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【单选题】为治黄疸要药的是
A.
川木通
B.
黄柏
C.
金钱草
D.
茵陈蒿
【单选题】在从原点出发的直线与总成本曲线的切点上,平均成本( )。
A.
与平均可变成本相等
B.
等于边际成本
C.
等于平均可变成本加上固定成本
D.
以上说法都对
【单选题】下列关于内环境稳态的叙述,错误的是 [     ]
A.
内环境的理化性质是相对稳定的
B.
内环境稳态是由体内各种调节机制所维持的
C.
内环境的理化性质是恒定不变的
D.
内环境稳态不能维持,机体的生命活动就会受到威胁
【简答题】下列关于内环境稳态 的叙述,错误的是 A. 内环境的理化性质是相对稳定的   B.内环境稳态是由体内各种调节机制所维持的 C .内环境的理化性质是恒定不变的  D.内环境稳态不能维持,机体的生命活动就会受到威胁
【多选题】药效动力学的内容包括:
A.
药物的作用与临床疗效
B.
给药方法和用量
C.
药物的剂量与量效关系
D.
药物的不良反应和禁忌症
【简答题】何谓内环境和内环境稳态?内环境稳态的生理意义如何?
【多选题】药物效应动力学的研究内容包括
A.
药物的作用
B.
药物的临床应用
C.
药物在体内的变化过程
D.
药物的作用机制
E.
药物的不良反应
【多选题】药效动力学的内容包括
A.
药物的作用与临床疗效
B.
给药方法和用量
C.
药物的剂量与量效关系
D.
药物的作用机制
E.
药物的不良反应和禁忌证
【多选题】药效动力学的内容包括:
A.
药物的作用与临床疗效
B.
药物的剂量与量效关系
C.
药物的作用机制
D.
药物的不良反应和禁忌症
【单选题】有关人体内环境稳态的叙述,错误的是 [     ]
A.
人体各器官、系统协调一致共同维持内环境稳态
B.
人体内环境稳态的失调与外界环境无关
C.
人体维持内环境稳态的调节能力有限
D.
稳态有利于参与其调节的器官保持机能正常
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