正常成年人角膜横径约为() A.9~10mm B.10~11mm C.11~12mm

题型:单项选择题

问题:

正常成年人角膜横径约为()

A.9~10mm

B.10~11mm

C.11~12mm

D.12~13mm

E.13~14mm

考点:北京住院医师眼科Ⅰ阶段眼科住院医师眼科住院医师题库
题型:单项选择题

A little knowledge (知识) can make a difference at a time of life or death. Do you know what to do if you find yourself in an earthquake?

If you are inside:

●Quickly move under a strong desk, a strong table or along a wall. You can also go into a small room like the bathroom. Do not get into a lift.

●Don’t stand near windows, large mirrors, heavy furniture or fireplaces.

If you are outside:

●Move away from buildings and streetlights. These could fall on you.

●Squat (蹲下) and protect your head until the shaking stops.

After the earthquake:

●Check, take care of injuries (损伤) and help make sure people around you are all right.

●Watch out for aftershocks.

●Protect yourself by wearing long pants, a long-sleeved(长袖的) shirt and strong shoes.

●Listen to the radio for the latest information.

小题1:If you are in a tall building when an earthquake happens, you’d better       .

A.run into a lift

B.not stay in the bathroom

C.stand near large mirrors

D.not stand near windows小题2:If you are outside during an earthquake,       .

A.you must move into a building

B.you cannot squat

C.you have to stop the shaking

D.you must move away from streetlights小题3: After the earthquake, you should       .

A.look after injuries

B.not listen to the radio for the latest information

C.protect yourself without wearing shoes

D.not help the others around you小题4:The underlined word “aftershocks” in the passage means       .

A.震感

B.震源

C.余震

D.防震小题5:The passage is mainly about       .

A.what to do before an earthquake takes place

B.what to do if you are in an earthquake

C.how to escape from an earthquake when you are at home

D.how to predict (预知) an earthquake in the open air.

题型:单项选择题

已知数列{an}中,a1=3,an+1-2an=0,数列{bn}中,bn·an=(-1)n(n∈N*)。

(Ⅰ)求数列{an}的通项公式;

(Ⅱ)求数列{bn}的通项公式以及前n项的和。

题型:单项选择题

影响皮肤颜色最主要的因素是()

A.脂肪

B.蛋白质

C.人种

D.黑素

题型:单项选择题

某班历史兴趣小组就“太平天国的背景有哪些?”展开了激烈的讨论,最后形成了下列结论。如果你是历史老师,你认为正确的有()

①鸦片战争结束后,鸦片走私更加泛滥,白银大量外流,导致银贵钱贱

②外国商品大量涌入,导致手工业者纷纷破产

③各级官吏大肆搜括百姓,自然灾害连年发生

④北伐战争失利,加剧社会矛盾

A.①②③

B.①②④

C.②③④

D.①②③④

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