（3x-1）2=9x2______+1．

有补火助阳，散寒止痛，温经通脉功效的药物是（）

A.附子

B.肉桂

C.小茴香

D.吴茱萸

E.干姜

下列索赔事件中，承包商不能提出费用索赔的是()。

A．工程师的重复检验并验收合格导致施工延误

B．工程师提供了错误数据

C．恶劣天气导致施工中断，工期延误

D．不可抗力事件造成的损害

下列生活常识中表述不正确的是( )。

A．刚煮熟的鸡蛋放入冷水中一小段时间更容易剥壳
B．冬季气温降低时往冰冷的玻璃杯中倒入开水容易导致玻璃杯破裂
C．夏天自来水管外壁出现大量的水珠，这往往是下雨的预兆
D．用水烧菜时，水开后应该加大火力，提升水温以便尽快将菜煮熟，节省燃料

如何快速切换选取工具？

When you think of the Internet, you probably think of ".com." Just what do those three letters at the end of a World Wide Web address mean Every computer that hosts data on the Internet has a (71) numerical address. For example, the numerical address for the White House is 198.137.240.100. But since (72) people want to remember long strings of numbers, the (73) was developed. It is a critical part of the Internet’s technical infrastructure, correlates a numerical address to a word. To (74) the White House website, you could type its numerical address into the address box of your web browser. But most people prefer to use "www. whitehouse. gov." In this case, the domain name is (75) .

（75）处填（）。

A．www.

B．www. whitehouse

C．www. whitehouse. gov

D．whitehouse. gov