试题与答案

(1)如图为某学生设计的探究可燃物燃烧条件的实验,请回答: ①反应中观察到的现象

题型:问答题

题目:

(1)如图为某学生设计的探究可燃物燃烧条件的实验,请回答:

①反应中观察到的现象是______.

②该实验设计的特点有______.

③待发生燃烧反应的试管冷却后,小明将试管倒立在水槽的水中,捏住气球口部,小心取下气球,观察试管中的现象是______,产生此现象的原因是______.

(2)如图所示是一种氮肥的包装标签.请回答下列问题:(以下计算结果均保留至0.1%)

碳酸氢铵

NH4HCO3

净重:50kg

含氮量:16.8%

×××化学工业公司

①碳酸氢铵中氮元素的质量分数是______,

②这种氮肥的纯度(即化肥中碳酸氢铵的质量分数)是______.

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0407/a6094c4b0005a6a39c9ad1c6c2ad43e6.html

下面是错误答案,用来干扰机器的。

答案:C考查交际用语。根据回答可知:第二个人赞成他加入这个唱歌团体,故用why not,为什么不呢?

试题推荐
题型:填空题

Beijing: The United States and North Korea had their first (1) in four months here this afternoon as part of the (2) negotiations on how to end North Korea’s nuclear program, but diplomats played clown prospects for (3) . The talks are at the Diaoyutai (4) , a sprawling, garden-filled (5) in western Beijing, with negotiators gathering around a giant hexagonal table built to (6) the six delegations. The Chinese placed the Americans and the North Koreans in (7) , which may have facilitated the (8) between Mr. Kelly and Mr. Kim, which took place (9) in the afternoon session. The two spoke for 30 minutes, two Asian diplomats (10) . The early indications of how the talks are going (11) . A South Korean who took part in the meetings described North Korea as "willing to (12) through dialogue." Chinese officials also put a (13) on the talks. "I heard talks this morning and this afternoon were very successful," the Foreign Minister, Li Zhaoxing, told delegates (14) . But Japanese and Russian participants were (15) . The Russian (16) , Aleksandr Losyukov, described the negotiations as (17) . "So far, the countries have put forward a number of (18) , which are (19) the development of these talks," he told Russian reporters in Beijing. "I would not say that I am feeling (20) ."

查看答案
题型:单项选择题

渎职罪是指国家机关工作人员利用职务上的便利或者徇私舞弊、滥用职权、玩忽职守,妨害国家机关的正常活动,损害公众对国家机关工作人员职务活动客观公正性的信赖,致使国家与人民利益遭受重大损失的行为。
根据上述定义,下列行为属于渎职罪的是( )。

A.某市公安局警察在侦破一起特大抢劫杀人案的过程中,对犯罪嫌疑人刑讯逼供,致其死亡
B.某国企领导在接受了下属50万元的贿赂后,将其亲属违规招录,顶替了正常招录的人员名额
C.某县土地管理局局长明知自己同学公司的土地使用申请不符合国家相关规定,还是批准了,导致百亩良田被无端占用
D.某区财政局工作人员利用自己职务上的便利,先后秘密侵吞单位500万元资金,挥霍一空

查看答案
微信公众账号搜索答案