应急发电机组如不要求自动起动时，可允许人工起动(如能证明其有效)，人工起动方式有（）

图是巴斯德著名的“鹅颈瓶”实验示意图．A瓶、B瓶内都装有肉汤，甲图表示A瓶煮沸，B瓶不作处理．一段时间后，其中一瓶仍然保鲜，另一瓶变质；接着，将保鲜那瓶的瓶颈打断（如乙图），数日后，瓶中肉汤也变质．请回答：

（1）甲图中肉汤仍保鲜的是______瓶，而将其瓶颈打断后，变质的原因是空气中的______进入瓶内．

（2）甲、乙两组实验所控制的变量都是______

A．瓶子的大小    B．细菌的有无   C．肉汤的多少

（3）乙图中控制改变量的方法是将瓶颈打断；而甲图中控制改变量的方法则是______．

（4）巴斯德的“鹅颈瓶”实验是否要经过重复多次才能得出科学的结论？______

（5）“鹅颈瓶”实验证实了细菌不是自然发生的，而是由原来已经存在的细菌产生的．为此，巴斯德提出了保存酒和牛奶的______

A．巴氏消毒法   B．腌制法   C．脱水法．

维特根斯坦前后期哲学之间存在着哪些“家族相似性”？

Have you ever wanted to feel like you were in a western film? Or maybe you wanted to feel like you were a pioneer traveling the west? It is possible to experience such things during a Wild West vacation! Here are four of the best Wild West vacation locations available:

Walk the Lewis and Clark Trail

Walk some or all of the 3,700 miles trail that was traversed by Mariwether Lewis and William Clark, two of the world’s greatest explorers. Though not all the trails are marked, there are various stops that have been preserved by various historic societies. There is also a coach (长途客车) that makes a 16-day trek following the trail. This begins in St. Louis, Missouri, and ends in Astoria, Oregon.

Venture Route 66

Take a tour or go to see it yourself — ride on the famous Route 66. The road is nearly 2,500 miles long. Harley Davidson offers motorcycle tours that last two weeks. Route 66 will provide an experience that may only be found on the open road. The historic road is still well taken care of.

Visit the Grand Canyon

Visit the greatest canyon in the world, located in Northern Arizona. Raft down the Colorado River, or hike the various trails that run throughout the canyon. If walking is not your thing, there are donkey and horse riding adventures available. In addition, there are motorized boats that float down through the canyon in a week’s time.

Visit Deadwood

Located in South Dakota, Deadwood is a historic landmark. It is the kind of town that comes to mind when one thinks of an old western film. Actors who act as gunslingers (杀手) will often be seen in the streets playing their roles. Winter activities are popular in this old town, and there is always something to do.

小题1:The underlined word “trek” (Para 2) can be replaced by      .

A．beautiful scenery

B．traveling information

C．pleasant holiday

D．long and hard journey小题2:Which of following riding adventures can tourists take on Route 66?              

A．A horse riding adventure.

B．A coach riding adventure.

C．A motorcycle riding adventure.

D．A donkey riding adventure.小题3:If you want to hike various trails you are advised to      .

A．visit the Grand Canyon

B．visit Deadwood

C．venture Route 66

D．walk the Lewis and Clark Trail小题4:What do we know from the passage?

A．A number of historic stops aren’t protected well.

B．William Clark was a pioneer who explored the west.

C．Western films are the most popular among Americans.

D．None of the trails in the west are marked.

具有降血脂作用的成分的是( )

A．葛根素
B．桂皮醛
C．柴胡挥发油
D．麻黄挥发油
E．柴胡多糖