题目

糯米是家庭酿酒的主要原料．为什么不采用普通米做酿酒原料呢?小科猜想可能是两种米的淀粉含量不同。于是就此问题进行了探究：取2支试管分别贴上1、2号标签，分别加入普通米饭和糯米饭(每份米饭均切成两小块)，各实验变量及10分钟后淀粉分解情况见下表。 试管编号 等质量的米饭种类 唾液 振荡后保温 是滞搅拌 加入碘液 结果 1 普通米饭 2毫升 37℃水浴中保持10分钟 充分搅拌 2滴 不变蓝 Smiling is the best way of making friends. When I was thirteen ____ old, my father found a job in the city. So my family moved there. I also came to a(n)_______ school near where we live. My old school was far away. At first, I didn’t know anyone in my class. I was very lonely ____ I was afraid to make friends with my classmates. I ____ talk to anyone about my problem, and I didn’t want my parents to ____ me.Then one day, something good happened. I was sitting at my desk unhappily as usual while my classmates were talking ____ with each other. At that moment, ____ came into the classroom. I didn’t know who he was. He passed me and then turned back. He looked ____ me and smiled. Suddenly, I felt happy and warm. That smile changed my life. I started to talk with the other classmates and made friends. Day by day, I became closer to everyone in my ____ .Thanks to the ____. I have moved on to a new life. Now, I believe that the world is what you think it is. So smile to the world and it will smile back.1.A. weeks B. months C. years2.A. old B. new C. open3.A. because B. before C. after4.A. couldn’t B. mustn’t C. needn’t5.A. talk to B. ask for C. worry about6.A. happily B. unhappily C. loudly7.A. a girl B. a boy C. a friend8.A. into B. like C. at9.A. family B. class C. city10.A. sadness B. life C. smile 1.C 2.B 3.A 4.A 5.C 6.A 7.B 8.C 9.B 10.C 【解析】文章通过讲诉作者在新学校里因为一个微笑而改变的故事，来告诉人们你对世界微笑，它就会回你微笑。 1.句意：当我13岁时。根据基数词+year(s) old 表示几岁；和后文在学校可知是13岁；故选C 2.句意：我来到我们住所附近的一个新学校...