问题
单项选择题 A1型题
核酸对紫外线的最大吸收峰是（）
A．220nm
B．240nm
C．260nm
D．280nm
E．300nm
答案
参考答案：C
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核酸对紫外线的最大吸收峰是（）
A．220nm
B．240nm
C．260nm
D．280nm
E．300nm
参考答案：C
We have an English corner in our classroom. Every morning many of my classmates come to the corner. My teacher Miss Zhang comes here, too. At the corner, we all speak English. The corner started last year. At first, there were only__ students because many were ____to speak English. After several weeks, more and more students came here. At first, some students just _____to the other students. I was one of them. I was afraid to speak English. I thought someone would ______me, but I wanted to speak. I always spoke English in my heart. My teacher went on saying, “Don’t be afraid. Open your mouth.” I tried and tried to open my mouth. At last, I said, “Hello!” to the teacher. The teacher was very ____. She said “Hello!” to me at once. From ___on, I began to speak English. I work hard at English and I try my best _more. I learn __my teacher and my classmates at the corner. Now I can speak a little English. Every Sunday morning, I come to the corner ___. It’s a good ___ to speak English. Please join us.
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