金属材料在外力作用下发生变形而不破裂，并在外力取消后仍能保持变形后形状的能力称为（）

阅读下面短文，根据短文内容回答问题。

I’m Molly Taylor. I’m happy to come here and give you a lesson. Some students think learning English is difficult, but if you know how to study English, you will find it very interesting and easy. Here are some ways to help you.

◆Don’t be afraid of speaking English.

◆Listen to English speakers often.

◆Watch lots of English movies and TV.

◆Listen to English songs.

◆Listen to English radio shows.

◆Do many English exercises.

◆Write to your friends in English.

There are so many ways to study English and you can use your favorite ones. But the most important thing is to study English every day. When you meet some difficulties (困难), you can ask your teachers or classmates for help.

Do your best and you will do well in English.

小题1:Does Molly Taylor write this passage (文章)?

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小题2:How many ways are there in this passage?

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小题3:What is the most important thing when learning English?

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小题4:What can students do when they meet difficulties?

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小题5:What is the passage about?

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被评为“四川省孝心少年”、“资阳市十佳美德少年”的叶富源（简阳市三岔中学高二学生）—背着父亲去上学的事迹撼动了众人的心灵。上述事件说明：

①一个人应该学会承担责任，做一个负责任的公民 ②承担责任往往伴随着获得回报的权利 ③承担责任与否，取决于我们的自愿选择 ④我们应进一步弘扬中华传统美德

A．①②③

B．①②④

C．①③④

D．②③④

冬虫夏草主产于（）

A．安徽

B．陕西

C．四川

D．江西

E．广东

为使谈判成功和达到预期目的，除制定好谈判策略、掌握好谈判时机和技巧外，还应有足够的( )。

A．资金准备

B．设备准备

C．人员准备

D．心理准备

在下列采购类别中，哪一个不属于按采购制度进行分类的类别（）。

A.政府采购

B.集中采购

C.分散采购

D.混合采购