尼日尔境内支付以现金为主,一般不能使用信用卡。

题型:判断题

问题:

尼日尔境内支付以现金为主,一般不能使用信用卡。

考点:尼日尔文化知识竞赛尼日尔文化知识竞赛题库
题型:判断题

N-甲基氨基甲酸异丙酯的结构式是______。

题型:判断题

人们的日常生活离不开金属,高科技新材料的开发和应用也需要金属.请回答:

(1)每年世界上钢铁的产量很高,钢铁的锈蚀也给人类带来了巨大的损失.铁在空气中锈蚀,实际上是铁跟空气中的 _________ _________ 共同作用的结果;

(2)在CuCl2和MgCl2的混合溶液中,加入过量的铁粉,充分反应后过滤,所得固体为 _________ .

(3)应用金属活动性顺序能帮助我们进一步学习金属性质.已知下列各组物质间均能发生置换反应.A.Fe 和CuSO4溶液      B.Mg和MnSO4溶液   C.Mn和FeSO4溶液

①写出Fe 和CuSO4溶液反应的化学方程式 _________ .

②Mn、Fe、Mg、Cu四种金属的活动性由强到弱的顺序 _________

(4)黄铜是铜、锌合金,外观呈现金黄色,和金相似.它用于制造机器、电器零件等.

①请选用一种化学方法区别黄铜和金 _________

②为测定某黄铜样品中铜的质量分数,取一定质量该黄铜样品加入到100g稀盐酸中,恰好完全反应,产生氢气0.1g.试求该黄铜样品中锌的质量和稀盐酸中溶质的质量分数.

题型:判断题

翻译,将短文中的中文短语翻译成英文,将画线的英语句子翻译成中文。

Some people always doubt (疑问) if the teenagers should do some housework for their parents .

Question:

             I want to know what chores are good for my 9-year-old son and 7-year-old daughter. 1. I know

they can't do much because they are so young. But I want to give them some things to do in the summer

holiday. I want to let them pick up their toys after they play with them. 2. And it will take me an hour to do it.

Is that a good idea? What do you let your kids do? 3. 你能给我一些建议吗?

Advice:

     When you ask your kids to do chores, you are teaching them how to clean and organize things.4. So it is

necessary for kids to do some chores. I have two children: 10 and 12- year-old boys. 5. 他们洗餐具洗衣服.

They break lots of dishes and bleach (漂白) their clothes, but they learn! Now they are very responsible

(负责的). Now if their beds are not made, they will make them. Also, they know how to study well and live

a happy life at school.

1._________________________________________________________________.

2._________________________________________________________________.

3._________________________________________________________________.

4._________________________________________________________________.

5._________________________________________________________________.

题型:判断题

建设“()”平台,推进健康养生产业与大数据产业融合发展。

A.健康大数据

B.健康云

C.健康养生

D.养生保健

题型:判断题

改善汊道包括调整水流与调整()两方面,如修建顺坝、丁坝、疏浚河道等。

A.边坡

B.宽度

C.深度

D.河床

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