恶性细胞转化的一个重要特征是() A.微管解聚 B.微丝解聚 C.微丝增加 D.微管

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问题:

恶性细胞转化的一个重要特征是()

A.微管解聚

B.微丝解聚

C.微丝增加

D.微管聚合

E.中间丝增加

考点:临床医学检验临床免疫技术细胞生物学细胞生物学题库
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心室肌有效不应期的长短主要取决于

A.动作电位3期的长短

B.动作电位2期的长短

C.阈电位水平的高低

D.动作电位。期去极的速度

E.钠泵功能

题型:单项选择题

在水面上漂浮着一座体积为20dm3、密度为0.9×103kg/m3的冰,则这块冰露出水面的体积是______dm3.如果该冰在阳光下以平均10cm3/s的速度熔化,则______s后冰块将全部熔化.

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Across the United States, universities and colleges have been looking to become more sustainable (可持续发展的) and more than 600 schools have already planned to become eco-friendly. The EcoDorm, home to 36 students at Warren Wilson College in Swannanoa, was designed to be sustainable from top to bottom, or in this case, from its rainwater-collection system to its garden. The dormitory is bringing new meaning to the concept of living “green” at college.

At Warren Wilson College, a biological science school with fewer than 1,000 students, the sustainability drive came from the student body. The EcoDorm concept was presented ten years ago by two students; a planning committee firstly suggested using building materials like corncob. Although the architects disagreed with the idea, they came up with other creative solutions: Wood siding was taken from the trees grown in the school yard that were suffering from a disease, and rainwater was collected in an old railway car and pumped back into the house to clean the toilets.

All in all, the dorm uses nearly two-thirds less electricity than a similar-sized traditional building would. But even the most sustainable homes need continued efforts from its livers. And in the case of EcoDorm, students live by their words. Most also take advantage of the dorm’s bio-garden, planting and harvesting fruits and vegetables. “I didn’t have to worry about paper towels being wasted or feel bad about drying my clothes outside,” Jeremy Lekich, the dorm’s gardener, said. “Basically, it has made my life easier.”

小题1:We can learn from the text that the EcoDorm in the US     .

A.offers students the chances to have a natural living at college

B.was firstly built by two college students

C.was designed for saving building materials

D.is only applicable in few schools小题2:The second paragraph is mainly about     .

A.where the EcoDorm was built

B.when the EcoDorm got its name

C.what the EcoDorm is made of

D.how the concept of EcoDorm started小题3:What is the advantage of the EcoDorm?

A.It helps students to enjoy life at college.

B.It saves a lot of money and energy for the college.

C.It makes students study harder.

D.It brings new energy to the college.小题4:What can be inferred from the text?

A.A long-term development calls for students’ efforts.

B.Students’ ideas should be encouraged at college.

C.Green living is a new trend at American colleges.

D.Students can learn to protect the environment through practice.

题型:单项选择题

旅行社安排的旅游活动及服务档次与协议不符,造成旅游者经济损失的,应退还旅游者合同金额与实际花费的差额,并赔偿()。

A.同额违约金

B.该差额20%的违约金

C.全部经济损失

D.实际经济损失

题型:单项选择题

下述哪些是漏斗胸的特点()

A.前胸壁胸骨中下部与其两侧肋软骨异常向后弯曲

B.手术治疗应尽早进行

C.漏斗胸与遗传有关

D.男性多于女性

E.常合并先天性心脏病

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