题干

化学兴趣小组对某品牌牙膏中的摩擦剂成分及其含量进行以下探究:

【查得资料】(1)该牙膏摩擦剂由碳酸钙、氢氧化铝组成;牙膏中其它成分遇到盐酸时无气体产生.(2)饱和碳酸氢钠溶液不吸收二氧化碳.

【设计实验】小组同学设计了如图所示装置(图中夹持仪器略去) 测定牙膏样品中碳酸钙的含量.

依据图示回答下列问题:

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阅读下面短文,掌握大意,然后从各题所给的四个选项(A、B、C和D)中,选出最佳答案。

          It was the end of my junior year,the weekend before a party.I was1around that night with some friends,and a2got passed around the car.Everyone was taking swigs(大口喝).Then the bottle got to me.I took a swig.That was the biggest3of my life,I had to drive4 later that night.

         About a mile from my house,a policeman turned his light bar on and I5over and waited for him to come to my door.“Can I see your6and registration please,Miss?”He took them and went back to his car for a while.When he returned,he asked if I had7

         “Yes sir,”I said.He asked me to step out of my car.

         All of a sudden I felt cold metal on my wrists.He8 me right then and there.As I was sitting in the back seat of his car,all I could think was,“God,I'm in so much9my parents are going to10me.”

         The cop drove me to a town twenty minutes from my home.Being arrested was so11.The next week I got a lawyer and I went to12two months after that.I got $ 700 in fines,forty hours of community13,and had to attend a MADD (Mothers Against Drunk Driving) meeting.I'll be on probation(缓刑)for a year,and I have to14driver's  education again.And I 15my license for a whole year!

          This has been a huge 16 experience for me.It opened my eyes to how17 it is to make a 18decision.I want everyone reading this to know that it's not19 to drink and drive,and it20isn't worth losing your license.