绿色化学的目标是降低或除去化学产品设计、制造、应用中有害物质的使用与产生,使所设

题型:选择题

问题:

绿色化学的目标是降低或除去化学产品设计、制造、应用中有害物质的使用与产生,使所设计的化学产品或过程对环境更加友好.它包括研究和寻找最大限度地节约资源和能源、减轻化工过程对人类健康与环境的负面影响,降低化工过程整体成本等的方法、技术.下列化工生产中体现绿色化学内涵的措施是(  )

①减少“三废”排放量;

②设计可重复使用的催化剂;

③回收未反应的原料、副产物和非反应试剂;

④研究有关产品的回收和再生利用;

⑤对废弃物进行排放前的无害化处理.

A.①②③

B.①③④⑤

C.①②③⑤

D.①②③④⑤

考点:绿色化学
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—Where is my English dictionary, Mum?

—It _____ away by your sister yesterday.

A. took

B. takes

C. is taken

D. was taken

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市场调查报告是调查报告的一种。调查对象主要有:()、()、()等。

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根据《合同法》规定:当事人主张抵销的,应当通知对方。这表明抵销是()

A.单方法律行为

B.双方法律行为

C.实践法律行为

D.无偿法律行为

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驾驶一般的后驱车,车辆出现转向不足(俗称推头)正确的操作是()

A.按喇叭

B.稍微回复方向盘

C.立刻松掉油门

D.轻踩制动减速

题型:选择题

Passage Four

It’s so difficult to follow the ups and downs of a 2-year-old.One moment he’s beaming and friendly; the next he’s sullen (愠怒的) and weepy, often for no apparent reason. These mood swings, however, are just part of growing up. They are signs of the emotional changes taking place as your child struggles to take control of actions, impulses, feelings and his body.
At this age, your child wants to explore the world and seek adventure. As a result, he’ll spend most of his time testing limits, his own, yours and his environment’s. Unfortunately, he still lacks many of the skills required for the safe accomplishment of everything he needs to do, and he often will need you to protect him.
When he oversteps a limit and is pulled back, he often reacts with anger and frustration, possibly with a temper tantrum (发脾气) or sullen rage. He may even strike back by hitting, biting or kicking. At this age, he doesn’t have much control over his emotional impulses, so his anger and frustration tend to erupt suddenly in the form of crying, hitting or screaming. It’s his only way of dealing with the difficult realities of life. He may even act out in ways that unintentionally harm himself or others. It’s all part of being 2.
It’s not uncommon for toddlers to be angels when you’re not around, because they don’t trust other people enough to test their limits. But with you, your toddler will be willing to try things that may be dangerous or difficult, because he knows you’ll rescue him if he gets into trouble.
Whatever protest pattern he has developed around the end of his first year will probably persist for some time. For instance, when you’re about to leave him with a sitter, he may become angry and throw a tantrum in anticipation of the separation. Or he may whimper, or whine and cling to you. or he could simply become subdued and silent. Whatever his behavior, try not to overreact by scolding or punishing him. The best tactic is to reassure him before you leave that you will be back and, when you return, to praise him for being so patient while you were gone. Take solace in the fact that separations should be much easier by the time he’s 3 years old.

The "ups and downs" (Para.1) of a 2 year-old refers to______.

A.his falling down and standing up

B.his successes and failures in doing things

C.his good and bad traits

D.his mood swings

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