我国的外流河与内流河，汛期均主要集中在夏季，原因是（ ）
A：受气温的影响，夏季全国普遍高温
B：受季风气候影响，雨热同期
C：东部外流河受夏季风影响，西部内流河受地形的影响
D：东部外流河受夏季风影响，西部内流河受夏季高温的影响
第一次世界大战爆发的根本原因是（ ）
马克思主义诞生的标志是 ( )
阅读短文，下列问题
B
Amy
I like singing. I can play the guitar and the piano. I want to join the music club.
Bill
Do you want to know my favorite sport? I like playing basketball very much.
I can playing it well.
Jackie
I like playing the piano very much. I often play the piano after school.
Frank
My favorite sport is playing soccer, and I’m good at it.
