问题
单项选择题
牙齿发育异常包括以下各类，除外 （）
A.数目异常
B.形态异常
C.颜色异常
D.结构异常
E.萌出异常
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
牙齿发育异常包括以下各类，除外 （）
A.数目异常
B.形态异常
C.颜色异常
D.结构异常
E.萌出异常
参考答案：C
实验题（共10分）
如果你翻动花园、庭院中的花盆或石块，常常会看到一些身体略扁、长椭圆形、灰褐色或黑色的小动物在爬行，这就是鼠妇，又叫潮虫。当你搬开花盆或石块，鼠妇很快就爬走了。这是为什么呢?是因为环境变明亮了吗?某同学对此进行了探究，请你将他探究活动的过程写完整。
(1)提出问题：鼠妇会选择阴暗的环境吗?
(2)作出假设：__________________________。
(3)制订实施探究方案：在铁盘内放上一层湿土，一侧盖上不透光的纸板，另一侧盖上透明的玻璃板，在铁盘两侧中央处各放5只鼠妇，观察鼠妇的行为。这样，在盒里就形成了 和 两种环境。该实验的变量是_____________。如果在铁盘两侧中央各放1只鼠妇 （填：是、否）可以得出准确的结论?为什么?
(4)分析结果，得出结论：该同学对上述实验重复了5次，结果如下表。
| 次数 环境 | 1 | 2 | 3 | 4 | 5 |
| 明亮 | 0只 | 1只 | 2只 | 0只 | 2只 |
| 阴暗 | 10只 | 9只 | 8只 | 10只 | 8只 |
（5）结论： 对鼠妇的生活有影响，鼠妇喜欢在 的环境中生活。
（6）为什么实验结束后要洗手？
A Faithful Father My husband ,kissed me goodbye ，stroked, the baby’s cheek and then rushed out of the door ，into his busy day. With the cold of the morning fading, I fed my baby and it fell fast asleep. Usually I would place it in bed and quickly have the house somewhat in 36______ , This morning ，however, I stayed seated ,just 37_____,with the baby in my arms ,The thoughts ran into 38______ of the mornings with my husband, a father rushing out of the door to meet the obligations of life. It was only a small jump to thoughts of my own 39______ My mother passed away when I was ten, and as I looked 40 ______I could see how much of a family man my dad was. He went to work every morning and 41______ to his family every evening. He 42______ food, clothing, warmth ，and protection. He was a faithful father. Setting the baby down ,I dialed the 43 ______ number. I had just realized the 44 ______ of the ordinary—the daily life going on around us that we often took for granted, and that it needed to be 45______ “Hi ，Dad. ” I said, 46______ back tears. “Hey, Bud- How are you? ” 47______ was in his voice.: “ Fine, Fm just calling to say. ,, thank you. ” I got it out before my throat 48______ too much for me to speak. "What for?” — For getting up and going to work every morning of ray life. Now that I have my' own 49______ and I see my husband doing the same ，I just wanted to thank you for being 50______ ” There was 51______ for a moment as my dad composed himself ，and with a small . .52______ in his voice he said, “You’re welcome, Bud. ” I don’t remember much of the rest of the call, 53______ that moment of revelation (显露） about my father, I will never forget. There are those who are known for their heroic 54 ______，and also those who are known for their fortunes and fame ，but it is the 55 ______everyday fathers who are the true heroes. I’m thankful that my father was one of them.
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