关于基牙倒凹深度与坡度的描述,正确的是() A.一般倒凹坡度应大于20° B.倒凹深

题型:多项选择题

问题:

关于基牙倒凹深度与坡度的描述,正确的是()

A.一般倒凹坡度应大于20°

B.倒凹深度越大,固位力越大

C.倒凹深度相同时,坡度越大,固位越差

D.倒凹坡度越木,对基牙面的正压力越大

E.倒凹坡度又称水平倒凹

考点:口腔科住院医师口腔修复学口腔修复学题库
题型:多项选择题

To save yourself from embarrassment (尴尬), it’s good to read a few books or research online about the culture and customs of the country you plan to visit.

Clothing: Wearing shorts in public is generally not acceptable in most parts of the world, including some European countries.

Greetings: Handshake is a usually accepted form of greeting, although in some countries, like Japan, a traditional bow(鞠躬) is preferred. Be careful how you talk with someone; don’t use first names unless you are invited to do something.

Language/Gestures: learn some polite expressions (hello-goodbye-thank you) and relax. English is pretty common worldwide, especially in tourist areas and you can always use body language to get your message across. However, some Americans gestures have different meanings in other countries. For example, in Bulgaria, shaking your head usually means  “yes”; shaking it “vertically” means “ no”.

Food/Drink: you may find yourself looking down at a local delicious snake soup in china, sheep’s eyes in Saudi Arabia… and wonder what to do; especially you are guests in someone’s home. Be brave, take small bites, and pretend it tastes like something you like. Remember that some Buddhists don’t eat beef, and Muslims don’t eat pork. If you are eating with Muslims, never touch food with left hand (the left hand is for bathroom use).

Conversations: if you know the history and culture of the country, you will be confident. The French are angry at the classic American question: “What do you do for a living?” and so on.

小题1:You should learn about _______ of the country if you want to go to another country.

A.the people and the food

B.the culture and customs

C.the language and people

D.the behavior and conversations小题2:A Japanese meet you for the first time, he/ she will ________.

A.shake hands with you

B.hug with you

C.kiss you

D.bow to you小题3:In Bulgaria, shaking your head usually means______________.

A.yes

B.no

C.victory

D.calm down小题4:Which of the following isn’t right?

A.You can’t wear shorts in public in most parts of the world.

B.You can use body language to communicate with people.

C.You can use your left hand to touch food when you eat with Muslims.

D.You can get along well with people you visit if you know their culture and customs well.

题型:多项选择题

如图所示,某同学用插针法测定一半圆形玻璃砖的折射率,在平铺的白纸上垂直纸面插大头针P1、P2确定入射光线,并让入射光线过圆心O,在玻璃砖(图中实线部分)另一侧垂直纸面插大头针P3,使P3挡住 P1、P2的像,连接OP3。图中MN为分界面,虚线半圆与玻璃砖对称,B、C分别是入射光线、折射光线与圆的交点,AB、CD均垂直于法线并分别交法线于A、D两点。

(1)设AB的长度为l1,AO的长度为l2,CD的长度为l3,DO的长度为l4,为较方便地表示出玻璃砖的折射率,需用刻度尺测量的有________ 。则玻璃砖的折射率可表示为___________。

(2)该同学在插大头针P3前不小心将玻璃砖以O为圆心顺时针转过一小角度,由此测得玻璃砖的折射率将_________(填“偏大”、“偏小”或“不变”)。

题型:多项选择题

朗格汉斯细胞没有的功能是()

A.递呈抗原

B.免疫监视

C.合成抗体

D.合成分泌细胞因子

题型:多项选择题

花岗石板材质地坚硬密实,抗压强度高,具有优异的耐磨性及良好的化学稳定性,不易风化变质,耐久性好,但由于花岗岩石中含有石英,在高温下会发生晶型转变,产生体积膨胀,因此( )。

A.花岗石耐火性好

B.花岗石坚硬密实,抗压强度高

C.花岗石耐火性差

D.干燥抗压强度及抗弯强度

题型:多项选择题

根据TB/T3193-2008《铁路工程预应力筋用夹片式锚具、夹具和连接器技术条件》中规定,当静载锚固性能试验中有一件不符合要求时下列说法正确的是()。

A、可判定为不合格

B、允许双倍取样复检

C、可判定为合格

D、不允许双倍取样复检

更多题库