有关纯碱和小苏打的叙述正确的是 [ ] A.等质量的Na2CO3、NaHCO3分

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问题:

有关纯碱和小苏打的叙述正确的是  [ ]

A.等质量的Na2CO3、NaHCO3分别与足量稀H2SO4反应,NaHCO3产生的 CO2

B.等质量的Na2CO3、NaHCO3分别与足量的同种盐酸反应,NaHCO3消耗的盐 酸多

C.向NaHCO3溶液中滴入Ba (OH)2溶液无沉淀,而向NaCO3溶液中加入 Ba(OH)2溶液出现白色沉淀

D.Na2 CO3和NaHCO3都既能与酸反应,又能与氢氧化钠反应

考点:碳酸钠碳酸氢钠
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由于部分家庭重男轻女,又由于个别机构唯利是图非法鉴定胎儿的性别,致使我市部分县市区出生婴儿的性别比严重失衡。为迅速扭转这种局面,济宁市人民政府于2014年3月11日在金乡召开了扭转人口性别比例失调的工作会议。下列有关说法错误的是

A.自然状况下,生男生女机会均等

B.胎儿性别在形成受精卵时就已确定

C.胎儿性别由母亲的卵细胞决定

D.胎儿性别由父亲的精子决定

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如图:花的基本结构图,请填写指示线所指部分的名称.

①______;②______;③______;④______;⑤______;⑥______.

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As crime skyrockets in many communities, people are finally beginning to look for long-lasting effective answers to stem the tide of juvenile crime. Reaching the youth who have committed a crime before they become (1) is an essential step in reversing the crime trend. One (2) may be the establishment of teen court. Teen court is known as a sentencing court for youths who have (3) . Teen courts primarily deal with first-time offenders. After arrest, the young offender must (4) to the charge in juvenile court. With (5) , the offender agrees to be sentenced and abide by the decision of peer jury (6) . Another essential component to teen court is that, as part of the sentence, the offender must sit in on one of more future peer juries to (7) for other offenders. For example, a county teen court in Illinois gives young offenders a chance to (8) their arrests from their permanent record by (9) or other duties ordered by the court. Teen court is not a trial court. All teens admit their guilt and (10) a sentence given to them by a jury of their peers. A judge is present to (11) of the court. The teen court alleviates the strain on the (12) and has been implemented in (13) since the first teen court opened in Odessa, Texas. Beside giving the offender a second chance, it gives the youth (14) in the judicial process.
The purpose of the teen court, aside from sentencing youth offenders, is to (15) both the offenders and the teen volunteers while simultaneously promoting (16) between defendants, the community, and the police. By offering this (17) system, teen court allows those teens who have made a bad decision an opportunity to (18) and learn from it. At the same time those teens learn (19) . The police, the community, and the (20) .

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低压配电系统中利用并联电容器组进行无功补偿时,三相电容器组常接成三角形。

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《社会保险费征缴暂行条例》规定,()、失业保险费和基本医疗保险费等三项社会保险费要统一征收,以减轻企业负担。

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