火星和木星沿各自的椭圆轨道绕太阳运行，根据开普勒行星运动定律可知： A．太阳位于
题型：选择题
问题：
火星和木星沿各自的椭圆轨道绕太阳运行，根据开普勒行星运动定律可知：
A．太阳位于木星运行轨道的中心
B．火星和木星绕太阳运行速度的大小始终相等
C．火星与木星公转周期之比的平方等于它们轨道半长轴之比的立方
D．相同时间内,火星与太阳连线扫过的面积等于木星与太阳连线扫过的面积
题型：选择题
Ma Lili’s parents are going to give a birthday party for her. She’s going to be fourteen years old. Ma Lili has a lot of friends. They are going to come to the party. They are girls from Ma Lili’s school. There are twenty-five of them.
Ma Lili’s mother is making birthday cakes for the party. They are very nice cakes. Ma Lili says to her mother, “Mum, you’re very nice. Thank you for your nice cakes. ” Her father is going shopping. He buys a lot of apples, bananas, oranges and pears.
It’s four o’clock in the afternoon. Now everything is ready. The party begins in thirty minutes.
1. Who is going to give Ma Lili a birthday party?
A. Ma Lili B. Her friends C. Her teacher D. Her parents
2. How many people are coming to Ma Lili’s party?
A. Two B. Twenty C. Twenty-one D. Twenty-five
3. Her mother _____ for her party.
A. is making cakes B. is shopping C. is buying apples D. makes a cake
4. How old is Ma Lili going to be?
A. 12 B. 13 C. 14 D. 20
5. What time does the party begin?
A. At four B. At half past four
C. After five o’clock D. At about six o’clock