问题 问答题 简答题

片剂包肠溶衣的目的和物料是什么?

答案

参考答案:

目的:防止药物刺激胃;防止药物在胃内分解失效;定位释放,增加疗效(如驱虫药)。物料:醋酸纤维素酞酸酯(CAP);虫胶;丙烯酸树脂Ⅱ、Ⅲ号;羟丙基甲基纤维素酞酸酯等。

单项选择题

This was one of my experiences (1) . When I was in my 30s, I was working for a large international company which had its head office in London. I was working in the (2) department.

The company had a training centre which was just outside London. Different courses were held there throughout (3) and I (4) go on one training course a year. These usually started (5) a Sunday evening and lasted six days.

Once I was (6) a week’s training course with about forty (7) sales people. I was in the bar on the Friday evening and suddenly a woman who was (8) behind the bar asked mea curious question. "I hope you don’t (9) my asking," she said, "but I’ve been (10) about it all week. Have you got a sister (11) Mary" The woman’s name was June. And she used to do various jobs at the training centre. She worked in the office, she organized all the food and drink for the centre and she worked in the bar at lunchtime and in the evening.

My answer (12) June’s question was "Yes", and June said, "I thought (13) . I met her last September when she was organizing a course here. " At that time, my sister was working for (14) company but in a different part of the country. That was (15) she came to be at the training centre.

(16) surprised me was how June guessed we were brother and sister. Three things made it even more (17) . First, she had met my sister six months before she met me. Second, they have about sixty new people every week at the training centre. So about one thousand five hundred people had (18) the centre in those six months. And (19) , my sister is married, so she doesn’t have the same family name as me.

We’re not (20) , but I guess we must look quite like each other.

2().

A.selling

B.sales

C.sale

D.sold

实验题

在探究弹性势能的大小跟哪些因素有关时,小明提出了如下猜想:

猜想一:弹性势能的大小与弹簧被压缩的程度有关;

猜想二:弹性势能的大小是弹簧的材料有关.

为此,小明选用材料不同的两根弹簧A和B(长度和粗细相同),小球、木块和长刻度尺各一,设计了如图所示的实验装置进行探究.实验中,木块起始位置相同.最后得出以下实验记录表.

实验次数使用的弹簧被压缩后弹簧的长度/cm木块移动的距离
弹簧A5S1
弹簧A8S2
弹簧B5S3
弹簧B8S4
(1)由于弹性势能的大小不便用仪器测量,本实验把弹性势能的大小转换为测量木块移动的距离,这种研究方法叫转换法.下列实验中用到此方法的是   _  __  (填序号).

①探究“杠杆的平衡条件”②探究“温度的测量中用液面的升降表示物体的冷热程度”

(2)请将探究猜想一的方案补充完整.

①将弹簧A、小球、木块按如图安装好;

②压缩弹簧,使其长度为5cm.放手后,小球被弹出,推动木块移动了一段距离S1;

③压缩弹簧,使其长度为_  __   cm.放手后,小球被弹出,推动木块移动 _  __ 

④比较分析实验数据_  __    ,得出结论.

(3)弹簧将小球弹开的过程中,是弹簧的弹性势能转化成小球的_  __ 能.

(4)为了探究猜想二,可选用试验次数②和_  __ 的数据进行比较分析,若_  __ ,说明弹性势能的大小与弹簧的材料有关.