企业第一年把全部商品出售，价格总额为100万元。第二年，该企业扩大经营规模10%

鳞状细胞癌除其恶性特征外还需具备

A．角蛋白形成和细胞间桥出现
B．巢状结构和细胞间桥出现
C．团块状结构和细胞间桥出现
D．片状结构和细胞间桥出现
E．核分裂象和细胞间桥出现

根据《中华人民共和国证券投资基金法》的规定，可以投资于股票、债券和国务院证券监督管理机构规定的其他证券品种的基金是（）。

A.创业基金

B.私募基金

C.证券投资基金

D.社保基金

在合格证持有人运行规范中，签派或者放行的标准应当在经批准的该机场的最低运行标准上至少增加下列数值，作为该机场用作备降机场时的最低天气标准：（1）对于只有一套进近设施与程序的机场，MDH/DH增加（）米，能见度增加（）米；（2）对于具有两套（含）以上非精密进近设施与程序并且能提供不同跑道进近的机场，MDH增加（）米，能见度增加（）米，在两条较低标准的跑道中取较高值。

礁糊秀

The most romantic time to arrive in Venice is at dusk on a winter’s day. Your water-taxi ride across the lagoon from the airport will catch the last velvety-grey streaks of daylight. You’ll arrive on the Grand Canal just as the upper windows of its palaces start to bloom with rose-coloured lamps or sparkle with chandeliers. In no other city does evening begin with such promise.

Strange, then, that Venice should be so emphatically not a night-time place. However mobbed it may have been in daylight, darkness falls with the abruptness of a hauled-down shutter. The crowds of Asian tourists and schoolkits milling around seem to vaporize. In a hundred closed cafes, the espresso machines give an expiring hiss, as if at last slipping off their shoes and wiggling their toes.

That is what makes Venice by night so magical, when the loudest sounds are those of footsteps and lapping water, and the modern world recedes so that in any Square or over any bridge, you wouldn’t be surprised to meet a hurrying figure in a cloak and buckled shoes; Casanova on his way to some assignation, perhaps.

St. Mark’s becomes an enchanted place, with pools of the day’s flood still underfoot and mist wreathing the cathedral. But "nightlife" seems nonexistent outside the weeks of carnival each February. In a city so stuffed with historical treasures, the lack of a living, modern culture is achingly apparent, especially after dark.

Venice’s only theatre of note, the Fenice, has only just reopened after almost a decade, following a fire. Clubs, discos, even cinemas are almost as hard to find as car parks. Nor is there the eating-out culture that governs the rest of Italy.

Venice is not usually regarded as a gourmet paradise. Even J G Links, author of the definitive, eccentric guidebook Venice for Pleasure, suggests it has few restaurants worth visiting outside the Cipriani hotel. As a rule, it’s best to avoid canalside establishments with their menus turisticos; look for places down alleys. Remember, this is rice, not pasta country, offering some of the best risotto you’re ever likely to eat.

When I first came here, aged 15, on a school trip, we were quartered in a girl’s convent school. Ever since, I’ve stayed at the Gritti Palace, on the Grand Canal, overlooking the Salute. Apart from its mixture of elegance and old-fashioned comfort, I have two reasons for loving this hotel. Alighting at its private landing stage completes the thrill of arriving in Venice by night. And it was here, 13 years ago, that Sue and I decided to get married and have our daughter.

Gondolas operate until well after dark. It can be doubly romantic, with the Grand Canal in pitch-darkness and silent but for the churn of water buses and scraps of operatic arias that some gondoliers still perform.

Latterly, Venice has been making more efforts to get a nightlife. There is a disco named Casanova near the railway station and a music bar, Piccolo Mondo, near the Accademia bridge. The city’s student population has created funkier areas around Campo Santa Margarita and in Cannaregio, the immigrant quarter to the north.

There is also street music after all the smart shops have closed and the only merchandise on offer is fake designer handbags, set out on the trestles used as walkways at times of flooD．Around one corner, you may come upon a countertenor in an anourak, singing Handel; around another, two men will be playing selections from Andrew Lloyd Webber on a vibraphone of water-filled glasses. You think that sounds totally naff I can tell you it sounded totally wonderful. Such is the alchemy of Venice by night.

Which of the following can best summarize the passage（）

A．Venice provides visitors with delicious food of Italian style.

B．Songs and music are special features of Venice by night.

C．If you want to enjoy nightlife, Venice is a wonderful place.

D．Venice is not a good place for nightlife at present, yet the evening of Venice has its own glamour.

气缸是活塞式压缩机中组成压缩容积的主要部分。以下关于气缸设计要点错误的是（）

A.应具有足够的强度和刚度

B.要有良好的冷却

C.尽可能增大气缸的余隙容积

D.结合部分的连接和密封要可靠