问题
单项选择题
引入芳环可增加亲脂性而引入脂肪链小则增加亲水性的是
A．氨基
B．氟原子
C．烷基
D．氧醚
E．巯基
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
引入芳环可增加亲脂性而引入脂肪链小则增加亲水性的是
A．氨基
B．氟原子
C．烷基
D．氧醚
E．巯基
参考答案：B
完形填空（每空1分，共10分） Hello! My name’s Alice. I’m a high school student. I’m very___1__every week. From Monday to Friday I go to school. I do homewor in the evening. I’m so tired that I want__2__a good rest at weekend.___3__ my mother often asks me to go__4__with her on Saturday morning. It usually__5__me about an hour .I___6__ enjoy these activities. When my mother goes shopping and I sit on a box and wait for her. Last Saturday, there was more noise than usual and everyone was in a hurry. My mother bought__7__of things, such as meat, fish, fruit and vegetables.After one__8_ , a woman came up to me,“Excuse me,”she said. “Are you Alice? Your mother just__9___shopping , but her bags are very heavy. She wants you to carry them home__10__her.”
|