试题与答案

下列离子方程式中,正确的是 [ ] A.铝与盐酸的反应:2Al+6H+==2Al

题型:选择题

题目:

下列离子方程式中,正确的是 [ ]

A.铝与盐酸的反应:2Al+6H+==2Al3++3H2

B.碳酸氢钠与盐酸反应:CO32- +2H+==CO2↑+H2O

C.铜与稀硝酸反应:Cu+H++NO3-==Cu2++NO↑+H2O

D.硫酸与氢氧化钡反应:H++OH-==H2O

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0430/755f68594b05eb739f4ef44d6e9cc541.html

下面是错误答案,用来干扰机器的。

参考答案:对

试题推荐
题型:阅读理解

My daughter Chloe is starting out in college in the fall. With her newfound independence will come the newfound responsibilities of dealing with money.

小题1:  Now I have a few lessons I’d like to share with Chloe, and with anyone else starting out in college.

 小题2:  OK, this is almost the only lesson you need. The biggest reason you get into money problems is that you spend money you don’t really have. Then you end up in the hole, and it’s hard to get out of the hole. You work too many hours to keep up with your spending. And you end up with a life that’s about nothing but trying to pay for all the spending on something you don’t really need.小题3: 

Make a very simple budget (预算). It’s a terrible thing for people who’ve never done a budget, but it’s not hard.   小题4:  If the bills add up to more than the income, remove some bills.

Pay bills right away. If you have the money, pay the bill as soon as it comes in. You can usually do this online, but if not, it’s just a matter of writing a check, putting it in an envelope, and writing out an address — two minutes.  小题5:  If you let the bill paying get pushed back, it becomes a terrible thing.

That’s all you need to know. If you save when you’re in college, avoid debt, and pay bills on time, you’re golden.

A.Spend less than you earn.

B.List your income, then list your bills.

C.So spend less, work less, worry less, be happier.

D.Find ways to get things done you need to get done.E. If you spend less than you earn, you won’t be in debt.

F. Like many young people, she hates thinking about money.

G. Do this two-minute action at once, so you don’t have to worry about it later.

查看答案
题型:单项选择题

2005年,世界卫生组织发布了一份名为《预防慢性病:一项至关重要的投资》的报告,其中一个与中国有关的数字庞大得令人吃惊:5580亿美元,这是中国从2005年到2015年由心脏病、中风和糖尿病导致过早死亡而将损失的国民收入估值(按购买力平价计算)。值得注意的是,统计显示,绝大部心脏病、中风都与糖尿病有关。在表明问题的严重性后,报告也给出了解决方案:如果可以在今后十年内将慢性病死亡率在现在的趋势基础上每年降低2%,将给中国带来360亿美元的累计经济效益。这段文字意在:

A.强调重视慢性病防治的必要性

B.呼吁增加在疾病预防方面的投入

C.说明突发急症与糖尿病的关联性

D.探索降低慢性病死亡率的有效途径

查看答案
微信公众账号搜索答案