题目

Here are the most popular festivals & fairs events in New York this year.Fanfaire NYC--High School of Art and DesignFrom: Today, Feb 8, 10:00 am To: Tomorrow, Feb 9, 6:00 pm $5.00 - $20.00 The Fanfaire NYC is a fun way to spend the day indulging in ones love of comic book art and meeting many of the people who help make them a reality. Super affordable to attend, and a nice way to spend the day with your fellow geeks. Don't miss out.New Jersey Convention & Exposition Center From: Friday, Mar 6, 10:00 am To: Sunday, Mar 8, 6:00 pm $8.00 - $10.00 Celebrate all that is handcrafted and see下列设备和器材中，利用浮力的是（ ）A. 抽水机 B. 气压计 C. 潜水艇 D. 铅垂线 C 【解析】试题分析：抽水机是利用大气压工作的，与浮力无关，故A不符合题意；气压计是测量大气压的仪器，与浮力无关，故B不符合题意；潜水艇是靠改变自身的重力来实现浮沉，利用了浮力，故C符合题意；铅垂线是利用重力方向始终竖直向下的重力制成的，故D不符合题意；故应选C。