问题
单项选择题 A3/A4型题
目前临床广泛使用的印模材料为糊剂和粉剂藻酸盐印模材料。糊剂型藻酸盐印模材料含（）。
A.藻酸钾
B.藻酸铵
C.藻酸钙
D.藻酸钠
E.藻酸
答案
参考答案：D
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目前临床广泛使用的印模材料为糊剂和粉剂藻酸盐印模材料。糊剂型藻酸盐印模材料含（）。
A.藻酸钾
B.藻酸铵
C.藻酸钙
D.藻酸钠
E.藻酸
参考答案：D
 As a teenager, I am often asked what I am going to be in the future. A lawyer? A doctor? Or a scientist? No, my ideal career is to be a teacher. One of the 小题1:for that is I want to be a teacher like Mr. Chen. “Look! Do you know what it is? A-ha, it’s the 小题2: ! And it will always move around the sun.” Mr. Chen said and pointed to his head. He then touched the nose and 小题3: , “Can you tell me the name of this mountain? It is the highest mountain on Earth! What’s the 小题4:of it? Yes, it’s 8844.43 metres…” I’ll never forget my first geography lesson. He was 小题5: humorous that we all fell in love with his lessons 小题6:. It’s Mr. Chen who opened the door of geography for us. Generally speaking, most of the teachers are strict小题7:students and sometimes a little bit demanding（苛求的）, not so with Mr. Chen. He is a lighthouse, showing us the way to the treasure of knowledge. He is a friend and easy to get 小题8: with, always encouraging us to speak out loud without 小题9:our shyness and other disadvantages. He is an example, volunteering his time to students and other teachers. One day I happened to meet him in the hospital. Seeing the cut on his arm, I realized he was donating his 小题10:. I was moved and was 小题11: another lesson, a lesson of love and devotion. Every time I see my globe（地球仪）, it would 小题12:me of Mr. Chen. He is the most unforgettable teacher I have 小题13:met and he will always be. Someday I hope I am 小题14: to be a teacher like him. Thank you, Mr Chen, thank you for making learning not a job but a joy. Thank you for helping me to discover what I do best and to do it even 小题15:Thank you for understanding all of us and giving us the time and care each of us needs.
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