竖直放置的轻弹簧下端固定在地面上,上端与轻质平板相连,平板与地面间的距离为H1,

题型:填空题

问题:

竖直放置的轻弹簧下端固定在地面上,上端与轻质平板相连,平板与地面间的距离为H1,如图所示。现将一质量为m的物块轻轻放在平板中心,让它从静止开始往下运动,直至物块速度为零,此时平板与地面间的距离为H2。若取无形变时为弹簧弹性势能的零点,则此时弹簧的弹性势能Ep=____________。

考点:弹性势能
题型:填空题
Charlotte Whitehead was born in England in 1843, and moved to Montreal, Canada at the age five with her family. While         her ill elder sister throughout the years, Charlotte discovered she had a(an)          in medicine. At 18 she married and          a family. Several years later, Charlotte said she wanted to be a          . Her husband supported her decision.
         , Canadian medical schools did not          women students at the time. Therefore, Charlotte went to the United States to study          at the Women’s Medical College in Philadelphia. It took her five years to         her medical degree.
Upon graduation, Charlotte         to Montreal and set up a private        . Three years later, she moved to Winnipeg, Manitoba, and there she was once again a          doctor. Many of her patients were from the nearby timber and railway camps. Charlotte          herself operating on damaged limbs and setting          bones, in addition to delivering all the babies in the area.
But Charlotte had been practicing without a license. She had          a doctor’s license in both Montreal and Winnipeg, but was        . The Manitoba College of Physicians and Surgeons, an all-male board, wanted her to         her studies at a Canadian medical college! Charlotte refused to          her patients to spend time studying what she already knew. So in 1887, she appeared to the Manitoba Legislature to         a license to her but they, too, refused. Charlotte         to practice without a license until 1912. She died four years later at the age of 73.
In 1993, 77 years after her         , a medical license was issued to Charlotte. This decision was made by the Manitoba Legislature to honor “this courageous and pioneering woman.”
小题1:
A.raisingB.teachingC.nursingD.missing
小题2:
A.habitB.interestC.opinionD.voice
小题3:
A.inventedB.selectedC.offeredD.started
小题4:
A.doctorB.musicianC.lawyerD.physicist
小题5:
A.BesidesB.Unfortunately C.Otherwise D.Eventually
小题6:
A.hire B.entertainC.trust D.accept
小题7:
A.history B.physics C.medicine D.law
小题8:
A.improve B.save C.design D.earn
小题9:
A.returned B.escaped C.spread D.wandered
小题10:
A.school B.museumC.clinic D.lab
小题11:
A.busy B.wealthyC.greedyD.lucky
小题12:
A.helped B.found C.troubled D.imagined
小题13:
A.harmful B.tired C.broken D.weak
小题14:
A.put away B.taken over C.turned in D.applied for
小题15:
A.punished B.refusedC.blamed D.fired
小题16:
A.display B.change C.preview D.complete
小题17:
A.leave B.charge C.test D.cure
小题18:
A.sell B.donateC.issue D.show
小题19:
A.continued B.promised C.pretended D.dreamed
小题20:
A.birth B.death C.wedding D.graduation
题型:填空题

关于老年性瘙痒病的治疗错误的是()。

A.可口服抗组胺药

B.使用性激素治疗可能有一定疗效

C.可根据病情选用含止痒剂的炉甘石洗剂、皮质激素软膏和霜剂

D.继发湿疹样变或苔藓样变者禁用皮质激素制剂

E.可口服镇静催眠药

题型:填空题

《中华人民共和国食品卫生法》出台后,又制定出了哪两部关于保健食品的法规对我国境内申请国产或进口保健食品的注册以及生产经营做出了详细的规定

题型:填空题

藏羚羊是我国青藏高原特有的动物,在可可西里自然保护区有分布。人们保护藏羚羊的目的是()

A.保护遗传的多样性和物种的多样性

B.保护生态系统的多样性

C.保护可可西里的植被

D.保护特定生态环境中的食物链

题型:填空题

启动离心机前,需要向()进规定量的乙二醇。

A、调制罐

B、稀释罐

C、中间罐

D、喂入罐

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