皮皮学，免费搜题
登录
搜题
【简答题】
在20种氨基酸中,酸性氨基酸有( )和( )两种
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】阅读下面材料，根据其内容，判断所给句子的正(T)误(F)。 I grew up in a hard neighborhood. It was very noisy－the streets were always full of people! The traffic was terrible, and parking(停车) was a big problem! I could never...
【简答题】阅读下面的材料，从每题所给的A、B、C三个选项中，选出最佳选项回答问题或完成句子。 Long ago, people lived on wild animals, fruits and other plants and they didn’t need to use money. As time passed, families had more products(产品) than they ne...
【简答题】阅读下面的材料，从每题所给的A、B、C三个选项中，选出最佳选项回答问题或完成句子。 I will never forget the lesson about my window. Four years ago, I moved to a house in a large town. One of my new neighbors’ house was only a few feet away fr...
【简答题】阅读下面的材料，从每题所给的A、B、C三个选项中，选出最佳选项回答问题或完成句子。 1. How old is Emma ? A. 2 B. 4 C. 6 2. From the card we know that_______. A. The party will begin at 2:30pm. B. The party will be held at home. C. The party w...
【简答题】第二节 阅读选择。阅读下面的材料，从每题所给的A、B、C三个选项中，选出最佳选项回答问题或完成句子。（共12个小题，每小题2分） A I will never forget the lesson about my window. Four years ago, I moved to a house in a large town. One of my new neighbors’ house wa...
【简答题】第十三課 クリスマス(問題).docx
【简答题】阅读下面的材料，从每题所给的A、B、C三个选项中，选出最佳选项回答问题或完成句子。 1. The picture tells about ____ of the school bus. A. the ad B. the news C. rules 2. Which of the following is true about the school bus? A. It can’t run over...
相关题目：