题目

在下图装置中，烧瓶中充满干燥气体a，将滴管中的液体b挤入烧瓶内，轻轻振荡烧瓶，然后打开弹簧夹f，烧杯中的液体b呈喷泉状喷出，最终几乎充满烧瓶。则a和b分别是（    ）   A(干燥气体)B(液体)ANO2水BCO24 mol·L-1 NaOH溶液CCl2饱和NaCl水溶液DNH31 mol·L-1 盐酸 答案：解析：本题主要考查喷泉的形成原理。要使液体充满烧瓶，则气体a应被b溶液完全吸收。其中NO2与水的反应式为3NO2+H2O====2HNO3+NO，可以看出生成了1/3体积的NO，水只能占去2/3的空间。而Cl2在NaCl饱和水溶液中的溶解度很小，更谈不上充满烧瓶了。答案：BDKnott’s Berry Farm is the nation’s oldest, and first, theme park and draws around five million visitors each year. Knott’s Berry Farm hardly had a very good start. Arriving in Southern California in the 1920s, the Knott Family farmed about 20 acres of land and finally started a restaurant called Mrs. Knott’ s Chicken Dinner Restaurant. Mrs. Knott’s food became well known and her husband Walter built a Ghost Town as a way of entertaining waiting customers. Today Knott’s Berry Farm has 165 rides, shows, attractions and restaurants. For more than 80 years, Knott’s Berry Farm has been entertaining families and visitors from around the world.There are six different themed areas with rides and attractions in Knott’s Berry Farm. Fiesta Village throws attention to California’s Spanish heritage（遗产）. Indian Trails is similar to Fiesta Village but with an accent on Native American legends, crafts, music and dancing. The heart and soul of Knott’s, Ghost Town is an 1880s California Boom Town with cowboys, gunfights, and a real steam train. The Boardwalk makes people think of Southern California beach. Wild Water Wilderness is an 1800s-style park with water rapids and a magical journey into Native North America. For Peanuts fans, Camp Snoopy is a six-acre children’s wonderland with 30 rides and attractions. Knott’s Berry Farm is in Buena Vista, Orange County, California. It is about half an hour from downtown Los Angeles and 10 minutes from Disneyland. Knott’s Berry Farm is open from 10 a.m. to 6 p.m. during the week. The park is open on Saturdays from 10 a. m. to 10 p.m. and from 10 a. m. to 7 p.m. on Sundays. During the summer months, the park is open later. The theme park is closed on Christmas Day1.The first paragraph is mainly about Knott’s Berry Farm’s ______.A.attractionsB.historyC.servicesD.prices2.Besides Indian Trails, you can also experience Native American culture in ______.A.Fiesta VillageB.the BoardwalkC.Wild Water WildernessD.Camp Snoopy3.What do we know about Knott’s Berry Farm from the passage?A.It is in Northern CaliforniaB.It is open all the year roundC.It has eight themed areasD.It is not far from Disneyland