1周角=( )直角. A.4 B.3 C.2

题型:选择题

问题:

1周角=(  )直角.
A.4B.3C.2
考点:角的认识,角的分类(直角,锐角,钝角)
题型:选择题

如图所示,a、b、c三个相同的小球,a从光滑斜面顶端由静止开始自由下滑,同时b、c从同一高度分别开始自由下落和平抛.下列说法正确的有(   )

A.它们同时到达同一水平面

B.重力对它们的冲量相同

C.它们的末动能相同

D.它们动量变化量的大小不相同

题型:选择题

病历摘要:女性,77岁,左腰胀痛10余天,无明显发热畏寒,有尿频尿急,无尿痛,曾解小便混浊,无肉眼血尿,症状逐渐加重并发现左腰部肿块。体查:左肾区扪及包块,约137cm大小,质软、不活动、明显压痛。血常规:贫血;尿常规:尿WBC500ery/μl,镜检WBC>500/μl,RBC2/μl;尿培养:无细菌生长。做CT检查。

3.鉴别诊断有哪些?

题型:选择题

Almost every child is scared of something, from monsters in the cupboard to dogs in the park. But the fact that such fears are common and normal doesn’t mean they can be taken lightly. Kids experience fears and phobias (恐惧症) much more strongly than adults. And the influence of the fear can be physical as well as psychological (心理的). It can build up so they almost seem scared of everything-a kind of childhood anxiety. Dr. Creswell says:"Your child may always seem to expect the worst to happen and lack confidence in his or her ability to deal with any challenge.” So don’t make the same old mistake of treating them as if they’re silly for being “a scared cat”(胆小鬼). Handing the fears is essential.

Children can be born nervous and., if you have such a baby, you’ll tend to prevent them from getting worried. So if they fear dogs, you’ll keep them away from dogs, but in fact that can just confirm to the child that dogs are scary. What is worse, keeping your child away from what they fear can turn that feeling into a phobia. Instead, you should encourage them to get in touch with the thing they fear, in a safe and supportive environment. Dr. Andy Field, a researcher of childhood fears, says: “You shouldn’t force, for example, a dog anxious child to go up to a dog. But you can approach it yourself, show them there is nothing to be afraid of, stroke (抚摸) it, and talk about the dog being friendly. Once your child dares to stroke a dog-one that’s good with children, of course-then you should encourage them to carry on until they feel calmer, and reward them for ‘being brave’.”

小题1:Children’s fears are usually taken lightly because     .

A.they will not develop into phobias

B.their influence is psychological

C.they exist widely in the world

D.they will disappear gradually小题2:If we fail to help children to overcome fears, they will    .

A.make the same old mistake

B.overcome them by themselves

C.experience the worst of things

D.grow up lacking self-confidence小题3:According to Dr. Andy Field, if a child is afraid of a cat, parents should     .

A.tell the child not to be afraid of it

B.show the child how to approach it

C.keep the child away from it

D.ask the child to stroke it

题型:选择题

慢性支气管炎的体征,下述选项中错误的是:()

A.早期可无异常体征

B.急性发作期常有散在干湿啰音

C.啰音多变,易变

D.常在背部出现固定性啰音

E.可有哮鸣音及呼气延长

题型:选择题

前置型出入口控制系统大量用于()的场合,对误识别率和误拒率的要求不高。

A、特殊安全要求

B、重要安全要求

C、较高安全要求

D、一般安全要求

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