根据《水利水电工程标准施工招标资格预审文件》，诉讼及仲裁情况表的年限要求为( )年

淋巴瘤纵隔肿大淋巴结的分布以哪组最常见（）

A.前纵隔

B.支气管旁组

C.气管与支气管组

D.隆突下组

E.中纵隔组

氯己定溶液致眼结膜不适感的最小浓度为（）

A.0.01%

B.0.02%

C.0.1%

D.0.1%～0.5%

E.1%

甲氧氯普胺（胃复安）具有强大的中枢性镇吐作用，这是因为（）

A.阻滞了多巴胺受体

B.激活了多巴胺受体

C.阻滞了吗啡受体

D.激活了吗啡受体

E.阻滞了Hi受体

腻子里的有机物也会给环境带来危害。

The development of e-commerce may well bring the world into a brand new era of "electronic currency". At the moment, (52) areas in Europe, the United States and Asia have already started studying the possibility of an electronic currency. Electronic currency is not only about currency. It (53) to an entire finance system on the Net. It includes a virtual numeric currency, an electronic system of withdrawals, transfers and loans, and (54) cards of all shapes and sizes. The (55) of an electronic currency system implies the emergence of "virtual banks" and "virtual enterprises". Actually, the first virtual bank appeared in the US in 1995. (56) it is a small and insignificant bank, it represents the trend of the future. In time to come, we may even have to (57) the familiar paper currency.

As the Net pushes the economy (58) rapidly, the economy is also bringing the Net market forward, resulting in the Internet itself becoming the world’s largest emerging market. Of course, this is just the beginning. Although there are many companies which made huge profits (59) in the Internet market, they tend to be small companies. To date, most companies are making losses. The competition in the knowledge-based economy will also be more (60) This will definitely promote (61) and more efficient cooperation.

55().

A.appearance 

B.disappearance 

C.campaign 

D.ceremony