下列属于与产量有明确的技术或实物关系，只要生产就必然会发生，若不生产，其成本便为零的

Just how comfortable is your sofa? Would you be prepared to let a stranger crash out there for the night? And, on the basis of a bit of email correspondence and seeing a photo of the sofa belonging to 'A. N. Unknown', would you travel halfway across the world to do the same? It might sound crazy, but this is exactly what millions of people have done whilst participating in an activity known as couch surfing.

Couch surfing is traveling on a budget, using a broad network of contacts in order to get overnight accommodation for free, or at as little cost as possible. Participants join dedicated(专业的) websites, providing as much information about themselves as possible in order to make others feel comfortable hosting them, or using them as a host.

Various safety features are generally available in such online networks, like verification of names and addresses, personal references, and 'vouching for' a particular member as a reliable host or guest.

As well as the financial advantages of couch surfing, participants also claim that the practice gives them a more unique, authentic travel experience, allowing them to experience culture and cuisine through the locals, rather than from the confines of sanitized tourist accommodation. We open our minds and lives and welcome the knowledge that becomes available through cultural exchange.” Said Casey Fenton, founder of Couch Surfing. Com. “CouchSurfing wants to change not only the way we travel, but how we relate to the world.”

61．What is the right order of couch surfing?

a. Provide personal information.   b. Travel to the host’s house.

c. Join dedicated websites.     d. Check photos of sofas by ensiles.

A．d-b-a-c     B．b-c-a-d     C．a-d-c-b     D．c-a-d-b

62．Which is NOT a safety lecture of online network?

A．Verification of identity.   B．A copy of the passport.

C．Personal references. D．Vouching ior the member as rdioble.

63．From the text we can know that           .

A．participants can he hosted or a host

B．couch surfing tests people’s patience

C．couch surfing leads to trust between people

D．people couch surf simply for financial reasons.

64．The text mainly intends to            .

A．introduce a new way of traveling   B．teach how to keep the Internet safety

C．promote online products  D．advocate deals of saving money

65．What can he the best title of the test?

A．Touring the World on the Interne   B．Unique Advantages of Local Traveling

C．Around the World from Sofa to Sofa     D．Cultural Exchange by Correspendence

某商场柜台上写明：“售出的商品概不退换。”此举侵犯了消费者的( )。

A．自主选择权
B．公平交易权
C．知情权
D．依法求偿权

体格检查有力的证据是

A．左股骨下端皮温升高
B．左股骨下端(干骼端)深压痛
C．左股骨下端肿胀
D．局部血管充盈怒张
E．左膝关节伸屈受限

《潘多拉之心》中的“制帽匠”是（）。

A.基尔巴特·奈特雷伊

B.奥兹·贝萨流士

C.扎古席兹·布雷克

D.文森特·奈特雷伊

公安执法监督的对象是公安执法行为。 ( )