测定农药或除草剂等项目的样品瓶按一般规则清洗后,在烘箱内()℃下烘干4h。冷却后再用

题型:单项选择题

问题:

测定农药或除草剂等项目的样品瓶按一般规则清洗后,在烘箱内()℃下烘干4h。冷却后再用纯化过的己烷或石油醚冲洗数次。

A.150

B.180

C.200

考点:环境科学技术及资源科学技术环境监测环境监测题库
题型:单项选择题

No one knows exactly how many disabled people there are in the world, but the number may be over 450 million. The number of disabled people in India alone is probably more than double the total population of Canada.

In the United Kingdom, about one in ten people have some disability. Disability is not just something that happens to other people. As we get older, many of us will become less mobile (可动的) , hard of hearing or have failing eyesight.

Disablement can take many forms and happen at any time of life. Some people are born with disabilities. Many others become disabled as they get older. There are many progressive disabling diseases. The longer time goes on, the worse they become. Some people are disabled in accidents. Many others may have disability in the form of a mental illness. All are affected by people’s attitude(态度) towards them.

  Disabled people face many physical barriers(障碍). Next time you go shopping or to work or visit friends, imagine what would you do if you could not get up steps, or on to buses and trains. What would you do if you could not see where you were going or could not hear the traffic? But there are other barriers: prejudice(偏见)can be even harder to break down and ignorance (无知) represents by far the greatest barrier of all. It is almost impossible for the able-bodied to fully understand what the disabled go through, so it is important to draw attention to these barriers and show that it is the individual person(个人) and their ability, not their disability, which counts.

小题1:The first paragraph points out that ___________.

A.it is possible to get an exact number of the world’s disabled people

B.there are many disabled people in the world

C.the number of disabled people in India is the greatest

D.India has not much more disabled people than Canada小题2:The key word in Paragraph 4 is ___________.

A.barriers

B.disabled

C.disability

D.prejudice小题3: Which of the following statements is NOT true according to the passage?

A.There are about 10 percent disabled persons in the UK.

B.The whole society should pay more attention to the barriers faced by the disabled people.

C.Even the able-bodied may lose some of their body functions when they get older.

D.There is still prejudice against the disabled which results mainly from ignorance.小题4:It can be concluded(推断)from the passage that ___________.

A.we should try our best to prevent disablement

B.we must take a proper attitude towards the disabled

C.the able-bodied people will never fully understand the disabled

D.both physical and mental barriers are hard to break down

题型:单项选择题

下列关于制作洋葱表皮细胞临时装片的操作,不正确的是[ ]

A.用吸管在载玻片中央滴一滴清水

B.用纱布把载玻片,盖玻片擦干净

C.用镊子夹起盖玻片从载玻片的正上方直接盖下去

D.用镊子撕下一小块洋葱内表皮放在水滴中央并展开

题型:单项选择题

在密闭容器中发生反应:aX(g)+bY(g)cZ(g)+dW(g)反应达到平衡后,保持温度不变,将气体压缩到原来的1/2体积,当再次达到平衡时,W的浓度为原平衡的1.8倍。下列叙述中不正确的是

A.平衡向逆反应方向移动

B.a + b > c + d

C.Z的体积分数减小

D.X的转化率下降

题型:单项选择题

下面是黑龙江省丁老师远赴湖南长沙参加教学交流活动的教学过程简介和板书设计:

丁老师上课的课题是“湿地资源的开发与保护——以洞庭湖区为例”。该课教学过程中,以《岳阳楼记》引出洞庭湖之美及湿地的概念和重要性,以“北大荒”变“北大仓”说明湿地资源开发利用中存在的问题,以《论语》中的“仁者乐山,智者乐水……”引出保护湿地的意义。

下面为该课的板书设计:

上述板书中的“人”字字体设计的变化,左侧“人”字寓意人类在开发利用过程中趾高气昂、肆无忌惮;而右侧“人”字寓意人类在开发利用过程中的觉醒、谦和和理性的回归。“师‘地”’中的“地”指的是地理环境;“师”意为人们开发利用自然资源的过程中,不断总结经验教训,趋利避害.以实现可持续发展。

地理教学板书设计的基本要求有哪些?

题型:单项选择题

菌痢的潜伏期为()

A.1~2天

B.3~4天

C.4~5天

D.6~7天

E.7天以上

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