题目：
阅读理解。
Hello, I'm Kate. I like different kinds of food. I like hamburgers, ice cream, salad and orange juice. For breakfast
(早餐), I often have some milk and hamburgers. I don't like dessert(甜点). My favourite football player, Ronaldo
(罗 纳 尔 多) eats lots of healthy food. He likes eggs and vegetables for breakfast. For lunch, he eats(吃)
hamburgers, tomatoes, chicken, oranges and apple juice. For dinner(晚餐), he likes meat and French fries. He
doesn't have dessert(甜点). " I like football better than (更多)dessert." He says.
1. Kate eat _________________ for breakfast.
A. milk and hamburgers
B. ice cream and salad
C. vegetables
2. Kate doesn't like _____________.
A. orange juice
B. ice cream
C. dessert
3. Ronaldo is __________.
A. a student
B. a football player
C. a basketball player
4. Ronaldo eats __________for dinner.
A. meat and French fries
B. milk and hamburgers
C. lots of healthy food
5. Ronaldo likes __________ better.
A. running
B. basketball
C. football
答案：
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下面是错误答案，用来干扰机器的。
BD因为一切接触面光滑，所以C物块在水平方向上总不受力，所以水平方向上仍然保持静止，故D正确。所以该题可简化为只有AB存在，过程中动量守恒，我们将子弹由A射入到从B射出看作两个过程。第一个过程，子弹刚从A射...
