机滑跑刹车时地面摩擦力变化() A.在一定限度内随刹车力矩增大而增大 B.增大阻滚力

题型:单项选择题

问题:

机滑跑刹车时地面摩擦力变化()

A.在一定限度内随刹车力矩增大而增大

B.增大阻滚力矩就能增大地面摩擦力

C.刹车越重效果越好

考点:航空航天考试航空航天考试题库
题型:单项选择题

One morning, Mr. Smith came into the garden at the back of his house. He saw so much snow in the garden. Mr. Smith wanted to take his car out, so he asked a man to clean the road from his garage (车库) to the gate. He said to the man, “Don't throw any snow on the side. It will damage(破坏) the flowers in my garden, and don't throw any on the other side, because it will damage the wall. And don't throw any into the street, because the policeman will come.” Then he went out.

When he came back, the road was clean. There was no snow on the flowers, or the wall or the street. But when he opened the garage to get his car out, he saw: the garage was full of snow, the snow from the road, and his car was under the snow.

小题1:In the morning Mr. Smith found ______ was full of snow.

A.his garden

B.his garage

C.his house

D.his car小题2:He wanted a man to clean the road because ______.

A.He didn't like the snow.

B.He liked the very much.

C.He wanted to take his car out.

D.He often asks the man to clean the road.小题3:Where was Mr. Smith's car?

A.Under the snow.

B.In the street.

C.In the garden.

D.In the back of the garage.

题型:单项选择题

湿空气中包含的水蒸汽质量与干空气质量之比值称为()。

题型:单项选择题

我国人口最多的少数民族是下列中的:[ ]

A.维吾尔族

B.壮族

C.蒙古族

D.藏族

题型:单项选择题

SLE临床表现有()

A.蝶形红斑

B.关节痛

C.狼疮性肾炎

D.心肌炎

E.贫血

题型:单项选择题

[案例十]


男性患者,23岁,某大学三年级学生。自入大学以来,从不和宿舍同学一起聊天、谈话,也很少见有同学、老乡来找他,因此,同学们都背后戏称他为“怪人”。患者终日离群独处,冥思苦想,偶尔交谈亦不能与人合拍,说的有些是“玄论”,令人莫明其妙。学习成绩尚好,但性格孤僻,对人冷漠,又很怕羞,敏感。从不肯在公众场合出头露面,也没有什么知心朋友。在一段时期里,他突然着迷于气功,经常不上课,外出去找气功大师传授“功法”,回来时早晚面壁练功,搅得同学都非常反感,劝也不听,止也不住,一味我行我素,行为奇怪,简直像个“外星人”似的。

以下哪些对患者的诊断和鉴别诊断特别有帮助(选两项)

A.心理社会应激史

B.家族史

C.生长发育史

D.既往学习、工作情况

E.既往躯体疾病史

F.早年的人格特点

G.脑外伤史

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