搜题请搜索小程序“爱下问搜题”
问题 单项选择题

下列叶酸的特性中，错误的是

A．溶于水

B．水溶液中易被光解破坏

C．中性、碱性环境中对热不稳定

D．妊娠、哺乳期间需要量增加

E．孕期缺乏可致胎儿神经管畸形

答案

参考答案：C

单项选择题

B


Each year there is an increasing number of cars on roads and street are millions of new cars are produced. One out of every six Americans works at putting together the parts of cars, driving trucks, building roads of filling cars with gas. Americans won’t live without cars!
Most Americans find it hard to think what life would be without a car. However some have realized the serious problem of air pollution by cars. The polluted air is poisonous(有毒的) and dangerous to health.
One way to get rid of(排除)the polluted air is to build a new kind of car. That’s what several of the large car factories are trying to do. But to build a clean car is easier said than done. Progress in this field has been slow.
Another way is to take the place of the car engine(发动机) by something else. Engineers are now working on some new cars. Many makers believe that it will take years to develop a practical model that pleases man.
To prevent the world from being polluted by cars, we’ll have to make some change in the way many of us live. Americans, for example, have to cut down on the number of their cars. They are encouraged to travel and go to work by bike. Riding a bike is thought to help keep the air clean.
But this change does not come easily — a large number of workers may find themselves without jobs if a car factory closed down. And the problem of air pollution would become less important than that of unemployment(失业).
Although cars have brought us a better life, they have also brought us new problems.

Some large car factories in the USA are trying to build a new kind of car which ______.

A．is clean in itself

B．is used to clean streets

C．does not pollute the air

D．is easier to make
查看答案
多项选择题

王教授系中国公民，现在国内某大学任职，2011年12月份取得收入情况如下：
(1)当月工资收入3400元，奖金收入3000元。
(2)受科普出版社委托，为其编写《心理咨询》一书。按照协议约定，出版社于2011年12月20日支付给王教授稿酬19000元。
(3)2011年12月25日，受科技公司培训部邀请，为该公司员工进行心理咨询讲座，科技公司支付给王教授讲课报酬3900元。
王教授2011年的收入总额为20万元；2012年税务部门在进行税务检查时，发现王教授的稿酬和讲课报酬均无纳税记录。

工资、薪金所得税税率简表
全月应纳税所得额 税率(%) 速算扣除数(元)
超过1500元至4500元的部分 10 105
趟过4500元至9000元的部分 20 555
超过9000元至35000元的部分 25 1005
要求：根据资料回答187—191题：

根据我国税法规定，个人所得税的征税项目包括( )。

A．个体工商户的生产、经营所得

B．保险赔款所得

C．股息、红利所得

D．特许权使用费所得
查看答案