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【简答题】

A black hole is created when a large star burns out. Like our sun, stars are unbelievably hot furnaces (熔炉) that burn their own matter as fuel. When most of the fuel is used up, the star begins to die. The death of a star is not a quiet . First there is a huge explosion. As its outer layer is blasted off into space, the dying star shines as brightly as a billion suns. After the explosion gravity pulls in what’s left of the star. As the outside of the star sinks toward the center, the star gets smaller and smaller. The material the star is made of becomes tightly packed together. A star is so dense that a teaspoon of matter from it weighs billion of pounds. The more the star shrinks, the stronger the gravity inside it becomes. Soon the star is very tiny, and the gravity pulling it in is unbelievably strong. In fact, the gravity is so strong that it even pulls light into the star! Since all the light is pulled in, none can go out. The star becomes black when there is no light. Then a black hole is born! That’s what we know about black holes. What we don’t know is this: What happens inside a black hole after the star has been squeezed into a tiny ball? Does it keep getting smaller and smaller forever? Such a possibility is hard to imagine. But if the black hole doesn’t keep shrinking, what happens to it? Some scientists think black holes are like doorways to another world. They say that as the star disappears from our universe, it goes into another universe. In other words a black hole in our universe could turn into a “white hole” in a different universe. As the black hole swallows light, the white hole shines brightly—somewhere else. But where? A different place, perhaps, or a different time — many years in the past or future. Could you travel through a black hole? Right now, no. Nothing we know of could go into a black hole without being crushed. So far the time being, black hole must remain a mystery. Black holes are a mystery—but that hasn’t stopped scientists from dreaming about them. One scientist suggested that in the future we might make use of the power of black holes. They would supply all of Earth’s energy needs, with plenty to spare. Another scientist wondered if a black hole could some day be used to swallow earthly waste—a sort of huge waste disposal(处理) in the sky! 小题1:When the star begins to die ______. A.there is no fuel left in it B.its outer layer goes into space first C.a huge explosion will happen D.it doesn’t give off light any longer 小题2:Which of the following doesn’t help produce a black hole? A.The gravity inside the star is very strong. B.The light can’t go out of the star. C.The star becomes smaller and smaller D.The dying star shines very brightly. 小题3:The black hole ______. A.continues becoming smaller and smaller all the time B.goes into another universe and becomes a white hole C.can pull in everything we know of in the world D.will appear at another place at a different time 小题4:What’s the best title for this passage? A.A New Scientific Discovery: Black Holes B.How Do Black Holes Come Into Being? C.What Are Black Holes? D.Travel Through A Black Hole

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参考答案:
举一反三

【单选题】关于急性盆腔炎,下列处理不正确的是

A.
立即手术治疗
B.
半卧位休息
C.
补液及纠正电解质失衡
D.
静脉滴注广谱抗生素
E.
高热量、高蛋白、高维生素流质饮食

【多选题】根据我社柜员凭证处理的基本规定,凭证的基本要素包括有

A.
年、月、日
B.
收、付款人的户名和账号
C.
收、付款人开户社(行)的名称和社(行)号
D.
人民币符号和大小写金额
E.
款项来源、用途、摘要和附件张数

【单选题】王某下楼时不慎踝关节扭伤, 2h 后来医院就诊, 正确的处理⽅法是

A.
局部⽤热⽔袋
B.
局部⽤冰袋
C.
局部按摩
D.
冷、热敷交替使⽤
E.
⽤热⽔泡⾜

【单选题】应用较广泛的深度处理技术不包括______。

A.
活性炭吸附
B.
生物接触氧化
C.
生物活性炭
D.
臭氧氧化

【多选题】在道路客运承运人责任险案件处理中,哪些行为可视为重大过失行为进行拒赔:()

A.
车辆严重超载,但交警并未认定超载是事故发生的主要原因;
B.
驾驶员驾驶车辆与准驾车型不符;
C.
驾驶员明知安全装置不全而怀侥幸心理
D.
驾驶保险车辆肇事逃逸

【单选题】关于供区创面的处理,正确的是

A.
严密缝合敷料覆盖创面
B.
创面暴露,任其自然恢复
C.
采用邻近组织瓣滑行覆盖关闭创面
D.
创面行点状异体皮移植
E.
覆盖油纱即敷料绷带加压包扎

【单选题】32岁,女性,妊娠31周,少量阴道流血,以往曾有3次早产史。主要处理应是

A.
抑制宫缩,促进胎儿肺成熟
B.
左侧卧位
C.
注意休息,并给以镇静剂
D.
任其自然
E.
氧气吸人,给予止血剂
相关题目:
【单选题】关于急性盆腔炎,下列处理不正确的是
A.
立即手术治疗
B.
半卧位休息
C.
补液及纠正电解质失衡
D.
静脉滴注广谱抗生素
E.
高热量、高蛋白、高维生素流质饮食
【多选题】根据我社柜员凭证处理的基本规定,凭证的基本要素包括有
A.
年、月、日
B.
收、付款人的户名和账号
C.
收、付款人开户社(行)的名称和社(行)号
D.
人民币符号和大小写金额
E.
款项来源、用途、摘要和附件张数
【单选题】王某下楼时不慎踝关节扭伤, 2h 后来医院就诊, 正确的处理⽅法是
A.
局部⽤热⽔袋
B.
局部⽤冰袋
C.
局部按摩
D.
冷、热敷交替使⽤
E.
⽤热⽔泡⾜
【单选题】应用较广泛的深度处理技术不包括______。
A.
活性炭吸附
B.
生物接触氧化
C.
生物活性炭
D.
臭氧氧化
【多选题】在道路客运承运人责任险案件处理中,哪些行为可视为重大过失行为进行拒赔:()
A.
车辆严重超载,但交警并未认定超载是事故发生的主要原因;
B.
驾驶员驾驶车辆与准驾车型不符;
C.
驾驶员明知安全装置不全而怀侥幸心理
D.
驾驶保险车辆肇事逃逸
【单选题】关于供区创面的处理,正确的是
A.
严密缝合敷料覆盖创面
B.
创面暴露,任其自然恢复
C.
采用邻近组织瓣滑行覆盖关闭创面
D.
创面行点状异体皮移植
E.
覆盖油纱即敷料绷带加压包扎
【单选题】32岁,女性,妊娠31周,少量阴道流血,以往曾有3次早产史。主要处理应是
A.
抑制宫缩,促进胎儿肺成熟
B.
左侧卧位
C.
注意休息,并给以镇静剂
D.
任其自然
E.
氧气吸人,给予止血剂
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