下列选项中，（）不是防火墙的类型。A.网络层防火墙 B.应用层防火墙 C.链路层防火

The Vieira family moved to the United States in 1981. At that time, they decided to stop speaking Spanish at home and only communicate in English. This was because they were now living in an English-speaking country.

Now the Vieira children are adults, and they sometimes travel to Spain to visit their family and friends. But they cannot communicate with them. Unfortunately this is common. When people move to new countries, they often leave their own customs and mother language behind. This is a mistake because there are many benefits to knowing more than one language.

One advantage of speaking more than one language is that you can communicate directly with more people around the world. You do not have to depend on others to talk for you, so you’re more independent. People who know only one language must use others to help them communicate.

Furthermore, speaking a second language also allows people to experience other cultures and customs more effectively. Local expressions, vocabulary, and even jokes can have a powerful effect on a person’s understanding of another culture. So, knowing more than one language increases your knowledge of other cultures.

Finally, having more multi-language speakers improves relationships between countries. If people from different countries can communicate well, the world can become closer. Countries will then have more respect for each other and better understand each other’s problems.

The benefits of knowing more than one language are clear. In fact, there are no disadvantages. It is very sad that many people don’t try to learn another language. It is even worse when people let themselves forget their mother language and become silenced.

小题1:What is the passage mainly about?

A．The benefits of learning other languages.

B．The reasons why people come to America.

C．The importance of learning English.

D．How to learn another language.小题2:The passage begins with the experience of the Vieira family in order to_______.

A．discuss the need for teaching a new language

B．introduce the passage’s main characters to the readers

C．describe the advantages of moving to another country

D．show the problems of speaking only one language小题3:The underlined phrase “multi-language speakers” (Paragraph 5) means “people who know ______.”

A．their mother language

B．a new language

C．more than one language

D．body language小题4:According to the passage, if you can speak more than one language, you can____.

A．find a better job

B．make more friends

C．better understand history

D．communicate more independently小题5:Based on the last paragraph, which of the following is the worst?

A．Not knowing another language.

B．Forgetting one’s mother language.

C．Refusing to learn another language.

D．Failing to communicate with others.

有关可摘局部义齿基托的要求，不正确的是

A．整铸支架式义齿基托厚度为0.5mm

B．基托应与天然牙非倒凹区接触，密合无压力

C．上颌膊侧基托边缘应圆钝，略厚，以防基托下沉，刺激软腭

D．下颌基托后缘应盖过磨牙后垫的1/3～1/2

E．基托磨光面外形应为凹斜面

验光中，近视者视力下降，戴用-2.50DS镜视力可达正常，将镜度分别增至-2.75DS、-3.00DS视力仍为正常，改用-2.50DS/-0.25DC*180镜度视力保持正常，根据处方原则，应选用（）为配镜度。

A.-2.50DS

B.-2.75DS

C.-3.00DS

D.-2.50DS/-0.25DC*180

加拿大的一位运动医学研究人员报告说，利用放松体操和机能反馈疗法，有助于对头痛进行治疗。研究人员抽选出95名慢性牵张性头痛患者和75名周期性偏头痛患者，教他们放松头部、颈部和肩部的肌肉，以及用机能反馈疗法对压力和紧张程度加以控制。其结果，前者中有3/4、后者中有一半人报告说，他们头痛的次数和剧烈程度有所下降。
以下哪项，如果为真，最不能削弱上述论证的结论

A．参加者接受了高度的治疗有效的暗示，同时，对病情改善的希望亦起到推波助澜的作用。
B．参加者有意迎合研究人员：即使不合事实，也会说感觉变好。
C．多数参加者志愿合作，虽然他们的生活状况蒙受着巨大的压力。在研究过程中，他们会感觉到生活压力有所减轻。
D．参加实验的人中，慢性牵张性头痛患者和周期性偏头痛患者人数选择不等，实验设计需要进行调整。
E．放松体操和机能反馈疗法的锻炼，减少了这些头痛患者的工作时间，使得他们对于自己病情的感觉有所改善。

下列（）不能减少应力集中的影响。

①开小口；

②倒角；

③圆弧过渡；

④在截面变化处渐变；

⑤在截面变化处钻孔；

⑥增开切口。

A.①②③

B.②③④

C.③④⑤

D.①⑤⑥