用SQL语言描述“在教师表中查找男教师的全部信息“，以下描述正确的是A．SELECT

《会计法》要求，作为记账凭证编制依据的必须是()的原始凭证和有关资料。

A.经办人签字

B.领导认可

C.金额无误

D.经过审核无误

关于出生后造血，错误的是

A．淋巴器官产生淋巴细胞

B．出生后红细胞、白细胞、血小板均由骨髓产生

C．5～7岁以下幼儿几乎全部骨髓参与造血活动即为红髓

D．长骨骨髓腔为脂肪细胞所代替称为黄髓，即失去造血功能

E．正常情况下，成人主要的造血器官是骨髓

在符号种，各字母的含义是:D().

A．旋光度

B．折光率

C．温度

D．密度

E．光源

If you want to fully enjoy your vacation, then you’d better check the Durban City Tours! This is actually one of the best choices in South Africa today.

There is nothing more relaxing than to think about it that there is a place to go and relax, right? City life is stressful, but you can escape this situation and be in the place where there is noting but fun. Here in Durban you will get to see all the amazing tourist attractions. If you love animals and want to see some elephants wandering around the streets, then Durban is the place to go. You can even get to ride one if you want!

Here you will also get to taste all the delicious South African food. You can choose from Italian cooking to its native dishes. Durban is a great place to tour with your friends and family. You will learn a lot about its history through the landmarks you will see down the streets. Tourists and even the local villagers just can’t get enough of these treats!

However, it is important that you make the necessary arrangements. There are actually lots of tour guides that will help you as you make your journey along the streets of Durban. But if you prefer the best tour guides here in Durban, then you’d better settle for the Street Scene Tours. Their staff are all well-trained and professional. They will certainly make your stay here an unforgettable one. No wonder tourists prefer the Street Scene Tours when it comes to Durban City Tours.

小题1:What is the main idea of Paragraph 2?

A．Durban is a relaxing city.

B．City life means high pressure.

C．It is good to have a place to relax.

D．One can have fun riding elephants.小题2: If you walk in the street of Durban, what will impress you most?

A．Tourists from all over the world.

B．The buildings and many kinds of animals.

C．The streets and some wandering elephants.

D．The friendly local people and the scenery.小题3:. What does the last sentence in Paragraph 3 show?

A．The food can’t satisfy them.

B．They are bored with the streets.

C．They are treated very well here.

D．They never get tired of the sights.小题4: The author wrote the last paragraph mainly to      .

A．attract tourists to Durban

B．help readers make arrangement

C．introduce the tour guides in Durban

D．persuade tourists to choose the Street Scene Tours

近些年来，对于很多即将大学本科毕业的学生来说，到底是直接参加工作，还是继续读研究生，是一个两难的选择，请根据人力资本投资的有关知识，对以下问题加以分析。

读研究生的收益包括( )。

A．人力资本投资的收益时间变长

B．未来终身的工作收入增加

C．有机会获得更快的晋升

D．社会地位和声望的提升