潜水艇在水面下继续向深水处下潜的过程中，所受浮力和压强（     ）

地处赤道附近的乞力马扎罗山山顶终年积雪，成为“赤道雪峰”，其主要原因是（   ）

Dear Mum and Dad,

    How are you? I'm happy 1 America. It's cool here. What is the 2 like in London? Uncle Bob and Aunt Jenny are nice to 3. This is Uncle Bob and Aunt Jenny's  4, Toby. He is thirteen years old. We are good friends now. We 5 basketball every day. Tomorrow 6 Saturday. Uncle Bob and Aunt Jenny want to take Toby and me to the Haines Shoe House. It is a 7. It is 67 years old. Here is a 8 of it. There are two bedrooms, one kitchen 9 one living room. There is an ice cream shop in it too. I love ice cream! Are there 10 computers or TVs in the hotel? I will find it out (查明) tomorrow.

春秋战国时期是中国历史上思想文化空前繁荣的时代，思想领域出现了“百家争鸣”的活跃局面。某校将举办一次专题活动，请你运用所学知识参与策划。