下列哪项不是担保的方法（）A.保证 B.抵押 C.违约金 D.留置

扑救油罐火灾时对大面积地面流淌性火灾，采取（）分片消灭。

A、用水稀释

B、泡沫覆盖

C、围堵防流

D、干粉覆盖

论述乳糖操纵子的正调控和负调控机制？

阅读下面短文，根据第1至第3小题的具体要求，简要回答问题。

     Today, Bill Gates is the richest man in the world, but not long ago the richest man was the Sultan of

Brunei. Brunei is a tiny nation on the northwest coast of Borneo in Southeast Asia. It has been among the

richest countries in the world since oil was discovered there in 1929.

     Sultan of Brunei, the nation's leader, inherited (继承) $40 billion from his father in 1967. At that time,

he was reported to have more wealth than anyone else .By 2000, however, Sultan was estimated to be

worth only $10 billion.

     Much of the money has been used to help the people of Brunei, by providing them with free or cheap

public services, The 300000 people of that nation today enjoy free health care, education, and even a free

amusement park like Disneyland. People living in remote villages in the southwest of the country can get

free health care from the nation's Flying Medical Services.

     The money made from the oil industry has also helped the Sultan develop advanced airports and shipping

ports. The main seaport of Muara, which is about 28 kilometers to the northeast of the capital city Bandar

Seri Begawan, can take up to 7 or 8 ships at the same time. Since 1974,Brunei has also had its own airline,

Royal Brunei Airlines.

1. Where does Brunei lie? (回答词数不超过11个)

    ___________________________________________________________________________.

2. When did Sultan become the wealthiest? (回答词数不超过2个)

    ___________________________________________________________________________.

3. What do the people of Brunei enjoy for free?(回答词数不超过10个)

   ___________________________________________________________________________.

患者女，38岁，因“乳腺钼靶X线片普查发现右乳外上象限微小钙化，倾向恶性2d”来诊。查体：双乳、双侧锁骨上区和腋窝未触及肿物。肿物X线定位细针穿刺活检：癌。胸部、腹部CT和骨扫描未见转移。遂收入院行左侧乳腺癌区段切除术。术后病理：左乳高级别导管内癌，4.0cm×3.0cm×2.8cm，切缘阴性；ER（－），PR（－），HER-2（++）。

该患者乳腺癌病理分期（AJCC，2002年）为（）。

A.0期

B.Ⅰ期

C.Ⅱa期

D.Ⅱb期

E.Ⅲa期

F.Ⅲb期

可以在桥式起重机轨道上进行检修工作，但是检修地点两端绝缘夹具夹住。