试题与答案

如图所示,倾角为30°的光滑杆上套有一个小球和两根轻质弹簧,两弹簧的一端各与小球

题型:选择题

题目:

如图所示,倾角为30°的光滑杆上套有一个小球和两根轻质弹簧,两弹簧的一端各与小球相连,另一端分别用销钉M、N固定于杆上,小球处于静止状态.设拔去销钉M(撤去弹簧a)瞬间,小球的加速度大小为6m/s.若不拔去销钉M,而拔去销钉N(撤去弹簧b)瞬间,小球的加速度可能是(g取10m/s):(   )

A.11m/s,沿杆向上

B.11m/s,沿杆向下

C.1m/s,沿杆向上

D.1m/s,沿杆向下

答案:

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Dear Liz,

My stay in Thailand has certainly been the experience of my life. 

Life is busy and exciting.Bangkok is just like any other big city with a population of 10  million and heavy traffic.I'm very lucky because my host family is in a nice quiet area outside  the city.There are Mr. and Mrs. Phairat, their son Sanan, who is 18, the daughter Chinda, who  is 16, and Grandpa and Grandma.  

I go to an international school with Sanan and Chinda.The school teaches about 70 percent  in English,and 30 percent in Thai. I've learned some spoken language,but Thai writing is very difficult.The cooking lesson is my favourite.I'm learning all about Thai food and culture People don’t use chopsticks here,but spoons and forks.When I come back,I'm going to cook you a real Thai meal.   

Last weekend we visited some temples.We also drove to Pattaya beach near Bangkok.I  thought it was great,but Sanan and Chinda say that next month they’re taking me to Phuket  Island,where the beaches are even more beautiful.The month after next,we’re going to travel  to Mr.Phairat,s hometown in the north of Thailand.The Phairats own land there,and they  have two elephants.I’m going to ride those elephants — and even wash them.Sanan and  Chinda say it’s really fun.   

I'm amazed by everything in this country,especially by the elephants.Elephants are an  important pan of Thai culture and way of life.They have been a traditional symbol(象征)of  Thailand for many years in times of war and peace.In the seventh century,a Thai king trained 20,000 elephants for battle.

I’ll tell you all about my Thai boxing(拳击)lessons next time I write.

Love,

Mandy

小题1:How many family members are there in Mandy’s host family?

A.4.

B.5.

C.6.

D.7.小题2:Mandy writes in her e.mail that the__________ lesson is her favourite.

A.Thai speaking

B.boxing

C.Thai writing

D.cooking小题3:Next month,Mandy is going to visit__________.

A.Pattaya beach

B.Phuket Island

C.Phairat’s hometown

D.Bangkok小题4:According to the e-mail,__________has been a symbol of Thailand for many years.

   

A.

B.

C.

D.小题5:From the e-mail we know that Mandy is__________ when she stays In Thailand.

A.bored

B.quiet

C.excited

D.proud小题6:What is the possible subject of the e-mail?

A.Study trip in Thai land

B.Food culture in Thailand

C.Elephant riding in Thailand

D.International schools in Thailand

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题型:多项选择题 案例分析题

患者男性,50岁。病人于3年前出现腹胀、纳差、精神不振症状,伴有活动后气短,心悸,并且腹部逐渐隆起,无低热、盗汗等症状,否认肝炎、结核病史。在当地医院就诊,腹部超声提示腹腔积液,考虑结核性腹膜炎,给予抗结核,腹腔穿刺等处理,症状反复发作,查体:血压110/70mmHg,巩膜无黄染,双肺呼吸音清晰,心律齐,心音存在,未闻及心包摩擦音,各瓣膜听诊区未闻及杂音,腹部隆起,肝脾触诊不理想,移动性浊音阳性,周围血管征阴性,双下肢水肿。

提示:患者入院后,心脏超声检查示心包弥漫性增厚,回声增强和钙化,室壁运动受限。胸部CT检查,提示心包增厚伴心包钙化,诊断为缩窄性心包炎,拟行心包切除术。心包切除术手术要点有哪些?()

A.先松解左心,后松解右心的顺序

B.先松解右心,后松解左心的顺序

C.心功能好,提倡心包切除范围越彻底越好

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