His father has been a _1 (邮递员) for fifteen years._刷题宝

题干

His father has been a ____ (邮递员) for fifteen years.

上一题下一题 0.0难度选择题更新时间:2019-09-23 06:09:08

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postman

同类题1

阅读理解。

Aunt Judy's birthday is coming. She will be 38 years old. Dad and Mum are going to take me to her house. She lives in Guangzhou. We are going to go there by train. Her birthday party will be on Saturday. We are leaving on Friday afternoon. And we are coming back on Sunday evening. I am going to give my dear Aunt Judy a picture . I am drawing it now. I am drawing some beautiful flowers. I am drawing a small dog, too. That's because she likes dogs. The picture will be very nice.

同类题2

现有一瓶乙二醇和丙三醇的混和物，已知它们的性质如下表，据此，将乙二醇和丙三醇互相分离的最佳方法是（）

物质	分子式	熔点℃	沸点℃	密度（g/cm³）	溶解性
乙二醇	C₂H₆O₂	﹣11.5	198	1.11	易溶于水和乙醇
丙三醇	C₃H₈O₃	17.9	290	1.26	能跟水、酒精以任意比互溶

同类题3

如甲图所示，小球从竖直放置的弹簧上方一定高度处由静止开始下落，从a处开始接触弹簧，压缩至c处时弹簧最短．从a至c处的过程中，小球在b处速度最大．小球的速度v和弹簧被压缩的长度△L之间的关系如乙图所示．不计空气阻力，则从a至c处的过程中，下列说法中正确的是（）

同类题4

在核反应方程

中，X代表的粒子是

同类题5

人的消化系统中，消化和吸收的主要器官是（　　）

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