问题
单项选择题
下列全为昆虫的排泄器官的是（）。
A、马氏管、直肠、隐肾管系统
B、下唇肾、隐肾管系统、中肠
C、脂肪体、马氏管、直肠
D、下唇肾、马氏管、中肠
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
下列全为昆虫的排泄器官的是（）。
A、马氏管、直肠、隐肾管系统
B、下唇肾、隐肾管系统、中肠
C、脂肪体、马氏管、直肠
D、下唇肾、马氏管、中肠
参考答案：C
请阅读下面短文，选择最佳答案，将其标号在答题卡上涂黑。 Smiling is the best way of making friends. When I was thirteen 46 old, my father found a job in the city. So my family moved there. I also came to a 47 school near where we live. My old school was far away. At first, I did not know anyone in my class. I was very lonely 48 I was afraid to make friends with my classmates. I 49 talk to anyone about my problem, and I didn’t want my parents to 50 me. Then one day, something good happened. I was sitting at my desk 51 as usual while my classmates were talking happily with each other. At that moment, 52 came into the classroom. I didn’t know who he was. He passed me and then turned back. He looked 53 me and, without a word, smiled. Suddenly, I felt happy, lively and warm. That smile changed my life. I started to talk with the other classmates and made friends. Day by day, I became 54 to everyone in my class. 55 the smile, I have moved on to a new life. Now, I believe that the world is what you think it is. So smile at the world and it will smile back.
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