二轴晶负光性光率体垂直Bxa的切面，其光率体的椭圆半径为（）。

请你把成语补充完整，然后再将填入的部分读一读，你发现了什么？

至高无（   ）（   ）枯石烂     语重心（   ）（   ）暖花开

人才济（   ）（   ）征北战     说东道（   ）（   ）死不屈  

急性肝炎（）

A.肝轻度肿大

B.肝明显肿大，肝颈回流征阳性

C.早期肝大，晚期缩小

D.肝肿大质软，表面光滑

E.肝浊音界上移

颅底骨折患者禁止耳鼻滴药、冲洗和堵塞是为了防止()

A．脑疝形成

B．颅内压增高

C．头痛

D．颅内继发感染

E．脑脊液流失

阅读理解。

      In front of a popular restaurant, a line of customers wait for taxis. And wait. Most of the cabs (taxis)

are full. That's nothing unusual in this city of 4 million people. But it's 2:30 in the morning.

       Visitors to the Olympic Games may leave disappointed if they see Athens only through the eyes of the

typical tourist, who makes a beeline of the islands after the visit to the Acropolis (雅典卫城) and the unusual

and attractive Plaka district. To fully appreciate and discover Athens' many charms (魅力), do as the Greeks

do: walk out into the neighborhoods, find the packed nightclubs, eat at one of the innumerable (数不清的)

restaurants, or see Hollywood stars under real stars in a romantic outdoor cinema. 

      The Greek capital is named for the ancient goddess Athena, whose favourite animal was the owl (猫头鹰).

It's a fitting symbol for the city's nocturnal (夜里的) nature, which often reaches its highest point in summer

with a rush hour just before dawn.

       As native Athenian Panos Demestiha said, Athens by day is unlivable (不宜居住的), but it's magical at

night. Athenians face up to heavy traffic block, decreasing green space, dusty streets…City officials are using

the momentum (契机) of the August 13-29 Olympics to fix some of these problems and make city life more

bearable.

1. To the surprise of the visitors to Athens, _____. [ ]

A．most of the cabs are often full all day long

B. the cabs are often empty

C. the cabs are almost full even at 2:30 am

D. there is no cab in the street at 2:30 am.

2. The name of Athens came from _____. [ ]

A. a goddess

B. a famous athlete

C. a kind of animal

D. a kind of plant

3. The typical visitors will often visit the following places EXCEP _____. [ ]

A. the neighborhood

B. the Plaka district

C. the Acropolis

D. famous islands

4. The underlined word"bearable" in the last paragraph can be replaced by "_____". [ ]

A. astonishing

B. forgettable

C. exciting

D. comfortable