蒸汽通过喷嘴，属于（）。
A.绝热膨胀
B.等熵膨胀
C.等温过程
D.等容过程
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有一个美丽的小山村，地处城市饮用水的源头，山清水秀，景色宜人。近年来，村民相继在此办起了集休闲、度假、餐饮、娱乐为一体的“农家乐”。“农家乐”的兴起，使当地村民的钱包鼓了起来，房子高起来，汽车跑起来，衣着靓了起来……同时，小山村的垃圾也多了起来，在一定程度上污染了城市水源。为此，人们对是否停办“农家乐”发生了争执。
根据上述材料，回答下列问题：
（1）你认为是否应该停办“农家乐”？请你选择并说明其理由。
（2）结合材料，请你为该村的可持续发展出一个金点子。
| 完形填空。 | ||||
| There is a tendency to think of each of the arts as a separate area of activity. Many artists, 1 , would prove that there has always been a warm relationship between the various areas of human activity. 2 , in the late nineteenth century the connections between music and painting were particularly 3 . Artists were invited to design clothes and settings for operas and ballets, but sometimes it was the musicians who were inspired (给…以灵感) by the work of contemporary painters. Of the musical compositions that were considered as 4 to the visual arts, perhaps the most famous is Mussorgsky's Pictures at an Exhibition. Mussorgsky composed the piece in 1874 after the death, at the age of 39, of the artist victor Hartmann. 5 their friendship had not been a particularly long-lasting one, Mussorgsky was shocked by Hartmann's 6 death. The following year the critic, Vladimir Stasuv, who decided to hold an exhibition of Hartmann's work, suggested that Mussorgsky try to 7 his grief by writing something in memory of Hartmann. The exhibition served as Mussorgsky's inspiration. The ten pieces that made up Pictures at an Exhibition are intended as 8 rather than representations of the paintings in the exhibition. Between each is a promenade (舞曲中的行进), 9 the composer walks from one painting to another. The music is sometimes witty and playful, sometimes almost alarming and frightening. Through a range of surprising 10 . Mussorgsky manages to convey the spirit of the artist and his work. | ||||
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在一次运动会中，要求运动员从高为H的平台上A点由静止出发，沿着动摩擦因数为
（1）运动员到达B点的速度与高度h的关系；
（2）运动员要达到最大水平运动距离，B点的高度h应调为多大？对应的最大水平距离Smax为多少？
（3）若图中H＝4m，L＝5m，动摩擦因数
《行政处罚法》规定，当事人（），应从轻、减轻或者不予行政处罚。
A．受他人引诱有违法行为的
B．主动消除违法行为危害后果的
C．配合行政机关查处违法行为有立功表现的
D．受他人胁迫有违法行为的
E．不满18周岁，但已超过16周岁
数据库设计中，用E-R图来描述信息结构但不涉及信息在计算机中的表示，它属于数据库设计的（）。
A．需求分析阶段
B．逻辑设计阶段
C．概念设计阶段
D．物理设计阶段