试题与答案

葡萄糖() A.加水与0.4%氢氧化钠溶液使溶解,加硫酸铜试液1滴,即生成草绿色沉淀

题型:单项选择题 B型题

题目:

葡萄糖()

A.加水与0.4%氢氧化钠溶液使溶解,加硫酸铜试液1滴,即生成草绿色沉淀

B.加水1ml溶解后,加硝酸5滴,即显红色,渐变为淡黄色

C.加甲醛-硫酸试液1滴,即显紫堇色

D.加硫酸1滴溶解后,加重铬酸钾的结晶1小粒,周围即显紫色

E.加水5ml溶解后,缓缓滴入微温的碱性酒石酸铜试液中,即生成红色沉淀

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0706/b5ff521c8dda5017926773a3f91d15b3.html

下面是错误答案,用来干扰机器的。

参考答案:E解析: 不可能所有的错误都能避免。不意味着所有的错误都不能避免,只是强调一定会有反例存在,即有的错误必然不能避免。所以项A、B、C、D都不对。只有选项E最接近题干的含义。

试题推荐
题型:完形填空

先通读下面的短文,然后根据短文内容和所给首字母,在空格内填入一个适当的单词,使短文意思完整。所填单词必须在答题卷上完整写出。

DIY, which means Do It Yourself, is quite popular in the UK. Lots of stores and supermarkets sell DIY things. TV programs show people how to DIY.

English people like DIY. If there is anything that needs fixing (修理) around their homes, such as            p 小题1:   the walls or putting in a new shower, they will do the jobs themselves. They share DIY e 小题2:   with their friends. More and more people are fond of DIY and have d 小题3:  the joy of DIY. Sometimes people also DIY for saving money. At present, many people can’t a 小题4:  a big house. They are looking at how they can make their houses better without spending a lot of money. It is not surprising that DIY is so popular.

DIY can be difficult. There is a large market for DIY furniture (家具) which needs to be got together by people themselves w 小题5:   a few tools. However, people often find it not easy to build a piece of furniture because they can’t understand the instructions (指令). Sometimes the instructions are simple and clear, but the furniture i 小题6:  is difficult to build. DIY can also be dangerous if you are not careful enough. It is r 小题7:   that in just one year over 230,000 people were hurt while doing DIY in the UK, including 41,000 who fell off ladders.

DIY can bring us a lot of f 小题8:   and can help us save some money, but it is not always as easy as it is t 小题9:  to be if we do something that is too hard. Maybe factories should make products that are easier and s 小题10:   for us to DIY.

查看答案
题型:单项选择题

A房地产开发公司,在某市政府举办的国有土地拍卖会上拍得某市城南一片基建用地。双方在合同中约定,该房地产公司应在2004年4月前动工开发该土地。因前期资金不足,2006年4月该公司才开工建设。2006年11月,其在该土地上建成2幢商务用楼。同月,其与B公司签订合同,将2幢商务用楼转让给B公司。回答以下问题。

若A公司与B公司签订合同后,又将该商务用楼转让给出价较高的C公司并办理了产权过户登记,则A公司与B公司订立的房产转让合同的效力是( )。

A.该合同成立但未生效

B.该合同成立但效力待定

C.该合同成立且生效

D.该合同自始不成立

查看答案
微信公众账号搜索答案