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【简答题】
如图所示反应Ⅰ、反应Ⅱ和反应Ⅲ均是工业生产中常见的反应.其中A、B为化合物,C是温室气体之一,D和K均可用做干燥剂,H常温下为液态化合物,J是一种具有漂白作用的盐,反应Ⅲ和E与G反应的原理相同. (1)C与J的水溶液反应后生成的含氧酸的电子式是______. (2)E与G反应的离子方程式是______. (3)J久置后,即便不接触水、空气,本身也逐渐分解生成K,并放出气体,该反应的化学方程式是______. (4)工业上测定反应III产品的有效成分J的含量,先将一定量的产品的溶液加入过量的KI溶液和稀硫酸中,使之反应生成I 2 ,然后用Na 2 S 2 O 3 标准溶液滴定I 2 ,计算出结果. ①用Na 2 S 2 O 3 标准溶液滴定I 2 时选用的指示剂是______. ②生成I 2 的反应的离子方程式是______.
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举一反三
【多选题】关于梁顶面支座钢筋说法正确的有
A.
如果顶面支座钢筋起点和终点没有都锚固在支座中,那么我们选择软件中的“负筋”进行绘制
B.
如果顶面支座钢筋起点和终点没有都锚固在支座中,那么我们选择软件中的“面筋”进行绘制
C.
如果顶面支座钢筋起点和终点都锚固在支座中,那么我们选择软件中的“负筋”进行绘制
D.
如果顶面支座钢筋起点和终点都锚固在支座中,那么我们选择软件中的“面筋”进行绘制
【简答题】穴播器鸭嘴驱动气吸盘转动,气吸盘吸种孔一侧为负压,另一侧则处于种子室的充种区,种子在_的作用下被吸附在气吸盘孔上,种子随气吸盘一起转动。
【简答题】不孕症的男方因素主要为____、_____等。
【简答题】Complete the sentence with the correct form of personal pronouns.4. Doctors are not able to control ________ profitable activities.
【简答题】Complete the sentence with the correct form of personal pronouns.3. Medical care and education are cornerstones of society, because _________ is /are needed by both youngsters and s.
【单选题】当波长为600纳米的单色平行光垂直入射到光栅上时,第2级谱线出现在衍射角的正弦值为0.2处,且第四级缺级。若光栅的有效宽度为6毫米,则第二级谱线的分辨本领为:
A.
1000
B.
2000
C.
3000
D.
4000
【简答题】Complete the sentence with the correct form of personal pronouns.2. Traditional foods are very important. _______ are symbols of nations and culture.
【单选题】Chose the more academic sentence from the following two by avoiding first and second personal pronouns.
A.
Clear foreshadowing of events to transpire should be noticed in Hamlet.
B.
When you read Hamlet, you should notice clear foreshadowing of events to transpire.
【判断题】Discussion sections of academic manuscripts are usually written using the personal pronouns I and They, especially when comparing results with other groups.
A.
正确
B.
错误
【单选题】Chose the more academic sentence from the following two by avoiding first and second personal pronouns.
A.
This method was chosen because of its simplicity.
B.
I chose this method because it was less complex.
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