一个瓶子能盛1kg水,可用该瓶子盛1kg的下列哪种液体?( )(已知ρ水银>ρ水

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问题:

一个瓶子能盛1kg水,可用该瓶子盛1kg的下列哪种液体?(  )(已知ρ水银>ρ>ρ植物油>ρ酒精>ρ汽油)(   )
0℃、1标准大气压下部分物质的密度(kg/m3
1.0×1030.9×103
水银13.6×103干松木0.4×103
酒精0.8×1038.9×103
煤油0.8×1032.7×103

A.酒精

B.汽油

C.植物油

D.水银

考点:密度公式的应用
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女性,45岁,以“双手近端指间关节、掌指关节、腕关节肿痛3个月”来诊,无发热、皮疹及脱发,有晨僵,关节无畸形。化验:ESR 62mm/h,RF 460kU/L,ANA阴性,血常规、尿常规正常。

如要进一步明确诊断,哪项检查最有意义

A.血清补体检测

B.血清免疫球蛋白测定

C.血清肌酶测定

D.双手X线平片

E.胸片

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平滑面菌斑结构包括以下各层,除外 ()

A.菌斑牙界面层

B.稠密微生物层

C.菌斑体部

D.菌斑下层

E.菌斑表层

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《美国自由的故事》写道:美国人遇到了“两套对立的自由概念的体系”,一种是“为私营企业”自由服务;另一种是以“一种对财富平等的分享”为基础的“社会化的自由”。事实表明,大多数美国人在1936 年时都接受了这样的观点:自由必须包含由政府保证的经济安全。由此可知

A.罗斯福新政体现了第一种关于“自由”的观念

B.罗斯福新政体现了“另一种”关于“自由”的观念

C.大多数美国人认为政府应当保障公民的政治自由

D.大多数美国人认为“自由代表着从物质的无保障中得到解放”

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以下不能提高搜索精确性方法是()

A.使用准确的关键字

B.多个关键字组合

C.使用筛选功能

D.精确描述产品特点的句子

题型:选择题

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.

53().

A.bridges 

B.camps 

C.refers 

D.casts

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