有若干张面积分别为纸片,阳阳从中抽取了1张面积为a2的正方形纸片,4张面积为ab

题型:选择题

问题:

有若干张面积分别为纸片,阳阳从中抽取了1张面积为a2的正方形纸片,4张面积为ab的长方形纸片,若他想拼成一个大正方形,则还需要抽取面积为b2的正方形纸片(  )

A.2张

B.4张

C.6张

D.8张

考点:完全平方公式
题型:选择题

患儿,女,12岁。因呕吐、腹痛、嗜睡3天加重伴昏迷8小时来院急诊。1周前因受凉后发热、咳嗽,经当地医院静脉输注头孢呋欣3大后,出现乏力、口干、多饮、多尿症状进行性加剧。体检:T38.5℃,P120次/min,R34次/min,BP15/9kPa。消瘦、唇舌干燥,唇樱红,呼吸深大,皮肤弹性差,四肢肢端凉,可见大理石样花纹。右下肺可闻及湿啰音。

提示:静脉滴注胰岛素0.1U/(kg·h),1小时后复查血钾2.9mmol/L、钠148.mmol/L,血糖40mmol/L,血浆渗透压284mmol/L。患儿第1小时补0.9%氯化钠液及0.45%氯化钠600ml,血压12/8kPa。目前以下处理哪些正确()

A.继续静脉补钾

B.继续静滴0.45%,氯化钠液

C.静脉输注5%葡萄糖液

D.静脉输入血浆或全血

E.静脉输入25%人血白蛋白

F.继续每小时静滴胰岛素0.1U/kg

题型:选择题

下列关于降水的说法,不正确的是(  )

A.两极地区降水少

B.南北回归线附近大陆东岸降水比西岸多

C.中纬度地区沿海比内陆降水多

D.降水由赤道地区向两极地区递减

题型:选择题
关于磁感线,下列说法中正确的是(  )

A.两条磁感线可以相交

B.磁感线是磁场中实际存在的线

C.磁感线总是从N极出发,到S极终止

D.磁感线的疏密程度反映磁场的强弱

题型:选择题

In the Harry Potter films, Hermione Granger is better than her male friends and is considered the brightest pupil in her grade. Isn’t it often the same in schools of our real world? A great many boys fall behind their female classmates.

“It’s surprising but true that most of the top students have been girls since primary school. Girls are class leaders, club presidents and the top ones in exams,” said Wang Feixuan, 15, who studies at a Chengdu school. By any measure, Wang herself is a high-achiever. She is a top student, a team leader in her school’s sports club and a winner in national English and IT competitions.

But why do so many girls outperform their male peers(同辈)?

In Sun Yunxiao’s latest book Save Our Boys, he points out that the education system is “more suited to girls, who are good at memorizing and like to sit quietly and read.” Yet he also says that girls have to do so much more when they compete with males for honors, top universities and later good jobs. They can feel great pressure(压力)nearly every day.

This seems to be the same in most countries in the world. Young women in the United States are also reported to feel the same pressure to be perfect.

“Let’s look at what we ask of our teenage girls,” says an American professor Stephen Hinshaw in an interview.

He thinks that it’s no longer enough that a girl does well in school and is a caring friend. On the TV, on the Internet, and everywhere, girls see images of impossible perfection(完美).

Today’s young women must be good learners, good athletes, and fill their after-school lives with other activities. But they’re also asked to have the styles and looks of popular stars. “Be pretty, sweet and nice. Be athletic, competitive and get straight. Be impossibly perfect.” Stephen Hinshaw sums up.

小题1:The passage suggests that________.

A.our society asks far too much of teenage girls

B.teenage girls shouldn’t be so perfect at school

C.boys are always lazy ones rather than girls

D.American girls have less pressure than Chinese girls小题2:According to the passage, it is true that   .

A.boys are less smart than girls throughout school life

B.boys usually don’t have so much pressure as girls do

C.girls are all fond of the Chinese education system

D.girls are better at school because boys don’t work hard小题3:The underlined word outperform means_________.

A.mistake

B.misunderstand

C.ignore

D.defeat小题4:What’s the best title for the passage_________?

A.Impossibly Perfect Is Possible.

B.Why Are Girls So Perfect?

C.Perfect? Pressure Every Day!

D.Perfect: Boys or Girls?

题型:选择题

下列哪条不是躁狂状态的临床表现()

A.情绪高涨

B.思维反应快

C.思维反应慢

D.话多,活动多

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