有关哈雷彗星的叙述正确的是 ( )①彗星是在扁长轨道上绕地球运行的一种质量很小的天体②彗星呈云雾状的独特外貌③哈雷彗星的公转周期是76年④彗星绕日公转的方向与行星绕日公转的方向相同

题干

有关哈雷彗星的叙述正确的是 ( )
①彗星是在扁长轨道上绕地球运行的一种质量很小的天体
②彗星呈云雾状的独特外貌
③哈雷彗星的公转周期是76年
④彗星绕日公转的方向与行星绕日公转的方向相同

A：①②

B：③④

C：②③

D：①④

上一题下一题 0.0难度选择题更新时间:2018-08-09 08:10:10

C

Are you a sports lover looking for skill development in the off-season?

Joy of the Game (JG) has been working for the past 10 years. Come and join JG to develop skills as you prepare for the next season.

Classroom Information
Ages	Boys 8th—12th Grade
Skills	All Skill Levels
Days	Sunday (A 10—week Program) Half Day: Morning: 9:00 am—12:00 pm Afternoon:1:00 am—4:00 pm
Sample Schedule	Morning Period: (9:00 am—12:00 pm): Basketball, Volleyball, Floor Hockey Lunch Break: 12:00 pm—1:00 pm (Kids Must Bring Their Own Lunch) Afternoon Period: (1:00 pm—4:00 pm): Basketball, Floor Hockey, Soccer, Relay Races
Costs	Half Day: $ 50 per day Full Day: $ 90 per day