根据你现有的知识,设计简单易行的实验方案,用化学方法鉴别下列各组物质。 (1)铜

题型:实验题

问题:

根据你现有的知识,设计简单易行的实验方案,用化学方法鉴别下列各组物质。

(1)铜和镁(2)酒精和盐水

实验步骤实验现象实验结论
(1)
(2)

考点:物质的鉴别
题型:实验题

.下列叙述中正确的是(  )

A.等质量的O2、O3中所含氧原子个数之比为2:3

B.标准状况下,体积相等的CCl4和Cl2,前者含有的氯原子数是后者的两倍

C.1molCO和CH4的混合气体所含的碳原子数和1molCO2所含的碳原子数相等

D.10g NH3中含有原子数目约为4×6.02×1023

题型:实验题

临床确诊的多发性硬化,包括下列哪项

A.病程中一次发作,一处病变的临床证据

B.病程中两次发作,两个分离病灶的临床证据

C.病程中两次发作,一处病变临床证据和另一部位病变亚临床证据

D.病程中一次发作,两个分离病灶临床证据,CSF寡克隆IgG带阳性

E.病程中两次发作,一个临床或亚临床病变证据,CSF寡克隆IgG带阳性

题型:实验题

When someone has deeply hurt you, it can be extremely difficult to let go of your grudge. But forgiveness is possible and it can be surprisingly helpful to your physical and mental health. Indeed, research has shown that people who forgive report more energy, better appetite (胃口) and better sleep patterns. "People who forgive show less anger and more hopefulness," says Dr. Frederic Luskin, who wrote the book Forgive for Good. “So it can help save on the wear and tear, and allow people to feel more energetic."

So when someone has hurt you, calm yourself first. Take a couple of breaths and think of something that gives you pleasure: a beautiful scene in nature, someone you love. Don’t wait for an apology. "Many times the person who hurt you may never think of apologizing," says Dr. Luskin. "They may have wanted to hurt you or they just don't see things the same way. So if you wait for people to apologize, you could be waiting a very long time.” Keep in mind that forgiveness does not necessarily mean accepting the action of the person who upset you. Mentally going over your hurt gives power to the person who brought you pain. Instead, learn to look for the love, beauty and kindness around you. Finally, try to see things from the other person' s perspective. You may realize that he or she was acting out of ignorance(无知), fear even love. To gain perspective, you may want to write a letter to yourself from that person’s point of view.

小题1:The word “grudge” in the first paragraph most probably means _________.

A.understanding

B.forgiveness

C.anger

D.pity小题2:What’s the main idea of the first paragraph?

A.Forgiveness keeps yourself from being hurt.

B.Forgiveness helps stay mentally healthy.

C.Forgiving others does good to your health.

D.Forgiving yourself is the biggest challenge.小题3:According to the writer, what is the best way to calm down after being hurt?

A.Try to figure out why you get hurt.

B.Writer a letter to person who hurt you.

C.Persuade yourself to accept what others have done to you.

D.Think about pleasant things and forget about the hurt.小题4:Dr. Luskin advises us not to wait for an apology after being hurt because ______.

A.people seldom want to apologize

B.we’d feel worse accepting others' apology

C.we are not patient enough

D.people don’t mean it when they apologize

题型:实验题

军人委员会是连队以及与其相当的基层单位实行(),保障军人行使民主权利,开展群众性活动的组织,是党支部(基层党委)加强单位建设、团结带领官兵完成各项任务的助手。

A、权利民主

B、政治民主

C、经济民主

D、军事民主

题型:实验题

营造速生丰产用材林杉木I级苗(壮苗)苗高在()厘米以上。

A.25

B.35

C.45

D.55

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