相对湿度越小，表明湿空气的干燥程度越低。

       哥伦比亚前总统桑佩尔说：在经济全球化过程中，蛋糕做大了，“但是大蛋糕分给了富人，其他的人只得到面包屑”。这句话告诉我们，经济全球化带来的问题是 [ ]

A．环境污染严重

B．恐怖主义泛滥

C．毒品走私猖獗

D．贫富差距悬殊

根据《建设工程工程量清单计价规范》（GB-50500-2013），关于企业投标报价编制顺序的说法，正确的是（）。

A.投标报价由投标人自主确定

B.投标人必须按照招标工程量清单填报价格

C.投标人的投标报价高于招标控制价的应予废标

D.投标人应以施工方案、技术措施等作为投标报价计算的基本条件

E.为了鼓励竞争，投标报价可以略低于成本

新疆兴都公司将五百包长绒棉通过铁路运至郑州准备出售，委托郑州的伏牛公司将棉花存放于当地仓库，并约定在棉花出售后按售价比例给伏牛公司提成。伏牛公司将棉花存放于郑州北营仓库，并将仓单的复印件、发票等凭证寄回给兴都公司。半月后，兴都公司找到买家某纺织厂，双方签订了五百包长绒棉的买卖合同。合同约定先由纺织厂交付总价额50％的价金，兴都公司收到该款后将委托伏牛公司把全部货物的仓单背书给纺织厂，纺织厂在提货并验收以后一个月内付清余款。 过了首付款的约定期限多日，兴都公司仍未收到纺织厂的首付款，却打听到一个消息，该纺织厂因严重亏损将被其他企业收购。兴都公司立即致电伏牛公司，没有兴都公司的书面确认通知书，不得将棉花的仓单交给任何人。数日后纺织厂派人到伏牛公司取棉花仓单，并出示了与兴都公司的买卖合同和由某银行签发的付款保证书。伏牛公司见到合同及付款保证书，就将仓单背书给纺织厂，在纺织厂取完货给了回执后，就急急向兴都公司要提成。兴都公司立即回了个电传：没发给你们书面确认书怎么就随便放货，他们首付的钱还没给呢，如果这笔钱要不回来就要你们赔偿！ 根据以上案情，请回答下列问题并简要说明理由。

兴都公司与纺织厂买卖合同约定的是哪种类型的交付，所交付棉花所有权从什么时候起转移

阅读理解。

     In the centre of London there is a tall white building with the name "Bush House". It is the home of BBC

English.

     BBC is the abbreviation of the British Broadcasting Corporation. It is an organization maintained by the

government, providing British people with broadcasting and TV service. At first, BBC was established as a

private business. It began to broadcast on February 14, 1922. In 1927, it was reorganized and replaced by

the British Broadcasting Corporation. In November, 1936, it became the first TV broadcasting corporation

in the world with TV programmes broadcast. BBC provides people with the latest news, entertainment and

education. These programmes are not under the control of the government. Nor are they affected by other

organizations. In the meantime, BBC does not express its own opinion on international affairs or public

policy. BBC has two TV channels, covering the whole country, that is BBC-1 and BBC-2 and three radio

broadcast webs, one for family service, another for entertaining programmes, the third for special interesting

programmes. The third web broadcasts four programmes. They are classical music, teaching programmes,

sports and famous arts and common knowledge. BBC programmes include foreign language programmes,

broadcast in 35 foreign languages.

     The BBC World Service sends radio programmes around the world in 42 languages. With a regular

audience of about 140 million listeners, it reaches more people than any other ternational broadcaster. The

World Service also prepares news programmes for its sister television organization and is responsible for

a major new gathering service getting information form the world's media. The World Service receives a

direct grant from the British Parliament for operating international broadcasting.

     BBC English is part of the BBC World Service. BBC English is for people who want to improve their

English. It broadcasts all kind of programmes, which change from month to month. There is a special

grammar programme for explaining difficult grammar points. There are programmes about life in Britian.

There is also a programme about the differences between written and spoken English. English lessons are

broadcast every day on the radio with explanations in English and other languages. They are the easiest to

follow. For example, BBC English broadcasts programmes for China with explanations in Chinese.

     It is not difficult to find out information about the programmes. You can write to BBC English and ask

for any information you need.

     It is necessary to use a short-wave radio to pick up the programmes. Sometimes it is difficult to receive

them clearly. If you do have difficulties, it is better to try once again another day.

1. BBC English broadcasts all kinds of programmes _____.

A. which change from month to month

B. which change regularly

C. in special grammar rules

D. by explaining different grammar points

2. If one needs any information from BBC English, one can _____.

A. get it easily free of charge

B. get it easily by paying something

C. hardly get it without paying anything

D. seldom get it just by writing a letter

3. I think all the programmes from BBC English is of great use to you. This sentence means _____.

A. I think all the programmes from BBC English is very great

B. BBC English has many great useful programmes

C. You can use all the programmes from BBC English

D. All programmes from BBC English are very useful for me

行业标准规定：掘进巷道内胶带输送机必须按线铺设，误差不超过（）mm。

A、±50

B、±40

C、±30