假设某纯金属液体按均匀形核方式结晶，晶胚呈边长为a的立方体，晶胚的单位面积表面能为σ

根据“十一五”规划，试说明如何建设社会主义新农村。

法国文学家雨果的《巴黎圣母院》和画家德拉克罗瓦的《自由引导人民》反映的是19世纪早期法国浪漫主义文学艺术领域的突出成就，浪漫主义主要特点是：侧重从主观内心世界出发，抒发对理想世界的热烈追求，常用热情奔放的语言、瑰丽的想象和夸张的手法来塑造形象。这一思潮兴起的时代背景是

A．受世界大战和经济大危机冲击，人们从理性主义中惊醒而陷入怀疑、迷惘、苦闷中

B．各国改革或革命成功后，人们对启蒙学者所描绘的“理性”王国愤懑与失望

C．随着资本主义经济的发展，在思想领域兴起了反封建、反教会特权的斗争

D．战后各国进行改革，社会矛盾有所缓和

实验室中，利用下列装置可以制取某些气体，请回答下列问题。      

（1）写出图中标号仪器的名称：①__________________   ②__________________

（2）用大理石和稀盐酸反应制取CO₂，应选用的发生装置是（填代号，下同）__________________，最好选用的收集装置是__________________。

（3）加热固体碳酸氢钠或固体碳酸氢铵都能产生CO₂，其化学方程式分别是：

①2NaHCO₃══Na₂CO₃+H₂O+CO₂↑    ②NH₄HCO₃══NH₃↑+H₂O+CO₂↑

某同学采用反应①的方法制取CO₂，应该选用的发生装置是__________________，他不选择反应②制取CO₂的理由是_______________________________________________。

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.

混凝土强度等级C30，表示该混凝土的立方抗压强度为（）。

A.30kg/m²

B.30MN/m²

C.30N/m²

D.30N/cm²