在2A+B═3C+4D反应中,表示该反应速率最快的是( ) A.υ(B)=0.3

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问题:

在2A+B═3C+4D反应中,表示该反应速率最快的是(  )

A.υ(B)=0.3 mol•(L•s)-1

B.υ(A)=0.5 mol•(L•s)-1

C.υ(C)=0.8 mol•(L•s)-1

D.υ(D)=1 mol•(L•s)-1

考点:化学反应速率的计算
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五袋白糖以每袋50千克为标准,超过的记为正,不足的记为负,称量记录如下:+4.5,﹣4,+2.3,﹣3.5,+2.5。这五袋白糖共超过多少千克总重量是多少千克?

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腰椎旁交感神经阻滞的一个危险的并发症是腹膜后出血。

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下列物质与水混合充分搅拌后能导电的是 [ ]

A.碳酸钙

B.酒精

C.氢氧化铜

D.硫酸钠

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1912年3月,南京临时政府令:“查前清官厅,视官之高下,有大人、老爷等名称,受之者增惭,施之者失体。……光复以后,闻中央地方各官厅,漫不加察,仍沿旧称,殊为共和政体之玷。”有研究者发现,同年6月《申报》载:“公堂会审之时,(被告)就口口声声以老爷、大人相称,裁判官亦直受不辞。”上述材料最宜作为下列哪一观点的论据?()

A、作为“受之者”的裁判官沿用前清审判制度

B、作为“施之者”的被告不知民国政体之变

C、作为“受之者”的裁判官有意玷污平等制度

D、作为“施之者”的被告等级观念根深蒂固

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One is never at a loss for a place to (1) in Malaysia.The country’s cities and major towns have a (2) range of accommodation to suit all tastes and budgets. Most international- (3) hotels cater to total living requirements and as such, one (4) easily find restaurants, entertainment outlets and fitness centres within the (5) complex.
Several resort hotels even have adjoining golf courses and (6) parks with special privileges accorded to hotel guests. Family outings (7) these hotels can be a practical yet fun-filled activity. Guests (8) on longer stays may appreciate the serviced apartments situated within (9) major cities.
Malaysia is also an excellent destination for romantic getaways, (10) for honeymooners seeking an idyllic tropical retreat with (11) amenities. The country’s award-winning island resorts are paradises waiting to be (12) .
For budget-conscious tourists, there is an array of accommodations located (13) to amenities and tourist attractions. Budget accommodations in Malaysia are (14) according to the Orchid Classification Scheme and include hostels, bed (15) breakfast establishments, inns, boarding houses, rest houses and lodging houses. (16) Orchid rating is awarded to tourist accommodations offering basic facilities (17) well as safe and clean premises.
Adventurous souls can try (18) the innumerable value-for-money kampung-style chalets located along popular beaches. Nature (19) seeking communion with nature in Malaysia’s world-famous nature parks such (20) Taman Negara will be amazed by the easy availability of chalets with modern facilities in these areas.

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