含不同羟基的黄酮类化合物的酸性强弱顺序为()。 A.7,4′-二羟基>7-羟基>5-

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问题:

含不同羟基的黄酮类化合物的酸性强弱顺序为()。

A.7,4′-二羟基>7-羟基>5-羟基>一般酚羟基

B.7,4′-二羟基>一般酚羟基>5-羟基>7-羟基

C.7,4′-二羟基>4′-羟基>一般酚羟基>5-羟基

D.7,4′-二羟基>5-羟基>7-羟基>一般酚羟基

E.一般酚羟基>7-羟基>5-羟基>7,4′-二羟基

考点:中药执业药师中药学中医执业药师中药学专业知识模拟试卷四
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高速铁路运输的组织原则?

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Greece is one of the most beautiful countries of the world. Millions of tourists visit this place every year. In Greece the bus is the most convenient and preferred means of travelling. There are intercity(城市间的) buses operated by KTEL that interconnect(相互连接) various cities of Greece, and there are international buses operated by OSE that connect Greece to other European cities.

Every tourist must visit Greece at least once in life. This country is really a vacation heaven. It is the perfect blend of history and art with adventure and romance. You can dive into deep blue waters, climb up the mountains or enjoy ancient architecture and history.

Buses in Greece are cheap and very comfortable. All bus stations display schedules of buses on every route. Conductors and drivers are very polite and helpful. Travelers never face any trouble locating and boarding buses to their destinations. Tourists can always ask the conductor to inform them about their stop, so that they can get down at the right stop. Everyone here is more than happy to help tourists.

Athens, the capital of Greece, has three bus terminals. Buses to different part of Greece leave from different terminals.

Air-conditioned express buses(空调快车) also operated between major cities. They are faster and more comfortable than other buses. Tourists can choose guided Greece bus tour. These tours are the perfect way of exploring this great country.

Buses in Greece are also a great way of saving bucks on the journey. The long-distance bus system is very cheap. Buses save a lot of money to cover long distances, cheaper than taxis or cars. They are also the best means of interacting with local people. You can sit next to a native Greece and get some information about the place.

小题1:The company KTEL offers bus services__________.

A.to different cities in Greece

B.B.from Greece to other countries

C.to tourist attractions in Greece

D.from Greece to its bordering(相邻的) countries

小题2:It can be inferred from Paragraph 3 that the Greece are_________.

A.generous

B.hard-working

C.economical

D.warm-hearted小题3:If you are a tourist of Greece from oversea(海外), you’d better choose________.

A. taxis

B.B.cars

C.C.guided Greece bus tours

D.D.air-conditioned express buses

小题4:The underlined word “bucks” in the last paragraph probable refers to_______.

A.money

B.energy

C.time

D.trouble小题5:While taking long-distance buses, you can________.

A.know more about the bus schedules

B.B.make friends with the conductors

C.learn more about bus systems in Greece

D.learn something about the place you’re visiting

题型:单项选择题

对大理石地面进行清洁保养应注意的是()。

A.避免使用酸性清洁剂

B.碱性清洁剂也需选择使用

C.不能使用肥皂水

D.不要将清洁剂泼洒在地面上

题型:单项选择题

按船员职务分工,机舱起重设备的管理应由()负责。

A.轮机长

B.大管轮

C.二管轮

D.三管轮

题型:单项选择题

根据计量器具的结构、性能、使用频度等制定两次检定工作的间隔期,称为检定周期,按检定周期进行的检定称为()。

A.抽样检定

B.周期检定

C.临时检定

D.仲裁检定

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