满载右旋单车船静止中倒车使船首右偏，主要是由于（）的作用。A.伴流横向力 B.沉深横

特发性面神经麻痹下列描述中错误的是（）

A.任何年龄均可发病

B.男性多于女性

C.可继发眼部并发症

D.本病大多预后差

E.急性期可用皮质类固醇治疗

Five years ago, David Smith wore an expensive suit to work every day.“I was a clothes addict（有瘾的人）”he jokes.“I used to carry a fresh suit to work with me so I could change if my clothes got wrinkled.” Today David wears casual（不经意的，随意的） clothes—khaki pants （裤子）and a sports shirt—to the office. He hardly ever wears a necktie.“I am working harder than ever.”David says,“and I need to feel comfortable.”

More and more companies are allowing their office workers to wear casual clothes to work. In the United States, the change from formal to casual office wear has been gradual. In the early 1990s, many companies allowed their employees to wear casual clothes on Friday（but only on Friday）.This became known as“dress-down Friday”or“casual Friday”.“What started out as an extra one-day-a-week benefit for employees has really become an everyday thing.”said business Maisly Jones.

Why have so many companies started allowing their employees to wear casual clothes? One reason is that it’s easier for a company to attract new employees if it has a casual dress code.” “A lot of young people don’t want to dress up for work,” says the owner of a software company,“so it’s hard to hire people if you have a conservative（保守的）dress code.”Another reason is that people seem happier and more productive when they are wearing comfortable clothes. In a study conducted by Levi Strauss and Company, 85 percent of employers said that they believe that casual dress improves employee morale（心境，士气）. Only 4 percent of employers said that casual dress has a negative influence on productivity. Supporters of casual office wear also argue that a casual dress code helps them save money. “Suits are expensive, if you have to wear one every day,”one person said. “For the same amount of money, you can buy a lot more casual clothes.”

小题1:David Smith refers to himself as having been“a clothes addict,”because      .

A．he often wore khaki pants and a sports shirt

B．he couldn’t stand a clean appearance

C．he wanted his clothes to look neat all the time

D．he didn’t want to spend much money on clothes小题2:David Smith wears casual clothes now, because      .

A．they make him feel at ease when working

B．he cannot afford to buy expensive clothes

C．he looks handsome in casual clothes

D．he no longer works for any company小题3:According to this passage, which of the following statements is TRUE?

A．Company workers started to dress down about twenty years ago.

B．Dress-down has become an everyday phenomenon since the early 90s.

C．“Dress-down Friday”was first given as a favor from employers.

D．Many workers want to wear casual clothes to impress people.小题4:In this passage, the following advantages of casual office wear are mentioned EXCEPT_______

A．saving employees’ money

B．making employees more attractive

C．improving employees’ motivation

D．making employees happier

社会管理创新中“三种类型、四个层级”的含义是（）。

A、三种类型是城市、农村、牧区；四个层级是县、乡、村、社。

B、三种类型是城市、乡、村；四个层级是农村、乡、社。

C、三种类型是牧区、村、社；四个层级是城市、县、乡

自然人及一般机构开立证券账户，由中国结算公司受理；证券公司和基金管理公司等机构开立证券账户，由开户代理机构受理。( )

MK系列全液压钻机的主机由（）、（）、（）和机架组成。