根据下面的教学案例回答下列问题。
【化学学习任务】认识二氧化碳与水的反应
【化学教学活动1】教师讲授，将二氧化碳通入盛有紫色石蕊溶液的试管中，溶液变红。
【化学教学活动2】教师演示，“向盛有紫色石蕊溶液的试管中通入二氧化碳”的实验，引导学生观察溶液颜色的变化。
【化学教学活动3】学生进行“向盛有紫色石蕊溶液的试管中通入二氧化碳”的实验，观察溶液颜色的变化。
【化学教学活动4】学生进行如下实验，观察实验现象。
【实验1】取少量固体石蕊于试管中，向其中通入二氧化碳；
【实验2】取少量固体石蕊于试管中，向其中加入少量水，充分振荡，待溶解后，向其中通入二氧化碳。
录像厅、放映厅的疏散人数，应根据厅、室的建筑面积按（）人／m2计算；其他歌舞娱乐放映游艺场所的疏散人数，应根据厅、室的建筑面积按（）人／m2计算。
(41)____________________
Through laziness and cowardice a large part of mankind, even after nature has freed them from alien guidance, gladly remain immature. It is because of laziness and cowardice that it is so easy for others to usurp the role of guardians.
It is so comfortable to be a minor! If I have a book which provides meaning for me, a doctor who will judge my diet for me and so on, then I do not need to exert myself. I do not have any need to think; if I can pay, others will take over the tedious job for me. The guardians who have kindly undertaken the supervision will see to it that by far the largest part of mankind, including the entire "beautiful sex," should consider the step into maturity, not only as difficult but as very dangerous.
(42)________________________
It is difficult for the isolated individual to work himseff out of the immaturity which has become almost natural for him. He has even become fond of it and for th
| More than 11,000 traffic lights and
"Don’t Walk" signals in New York City have been switched to light-emitting
diodes that use 90 percent less energy than conventional fixtures. More than
180,000 energy-guzzling refrigerators in public housing projects have been
replaced with new ones that use a quarter of the power of the old ones. For
years, New York has been the city that not only never sleeps, but the city that
hardly ever remembers to turn the lights out. On the coldest days of winter, New
Yorkers raise their windows to let out the heat. In the dog days of summer, a
husky could freeze in the open doorway of a Fifth Avenue boutique. But now,
measures like more efficient traffic lights and refrigerators are speeding up a
long trend making New York one of the most energy-efficient cities in the
nation--and officials in cities lik A. plant more green trees B. build more parks uptown C. take more energy-efficient measures D. have more buildings in green color [单选题]气测录井现场安装技术要求，电源电缆连接仪器房采用额定电流不小于（）A防爆插销连接，连接处做防水处理。
A.20 B.25 C.30 D.35 E.略 F.略 [填空题]组合框有3种不同的类型，这3种类型是下拉式列表框、简单组合框和下拉式组合框，分别通过把Style属性设置为______来实现。
[简答题]影响分光光度工作曲线不通过零点的因素有哪些？
[单选题]企业和金融机构的跨境融资签约币种.提款币种和偿还币种()。
A.须保持一致 B.经外汇局审批可以不一致 C.在充分考虑汇率风险的前提下可以不一致 D.以上皆对 [单选题]根据采购合同，A公司财务部门支付给B公司原材料采购款50万元，该财务活动是( )活动。
A.资金营运 B.投资 C.筹资 D.分配 [多选题]国家档案局第10号令《企业文件材料归档和档案保管期限规定》中的“管理类档案“一词,是指( )四类档案的统称。
A.行政管理类 B.党群工作 C.经营管理 D.生产管理 我来回答: 提交
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