已知直线l1:a2x+y+2=0与直线l2:bx-(a2+1)y-1=0互相垂直

题型:选择题

问题:

已知直线l1a2x+y+2=0与直线l2:bx-(a2+1)y-1=0互相垂直,则|ab|的最小值为(  )

A.5

B.4

C.2

D.1

考点:基本不等式及其应用
题型:选择题

地黄

A.动物体的某一部分
B.动物体某些部分的加工品
C.动物的排泄物
D.动物除去内脏的干燥体
E.动物的干燥全体

题型:选择题

Part 4


Questions 26-45


·Read the following text and decide which answer bestfits each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.

How to Tell Which Side You Favor


Brain researcher Ned Herrmann tested more than 7,000 people to find out which side of the brain they favored. He found a p relationship between hemisphere (26) and the way subjects made a (27) : left-brain-oriented subjects were more often lawyers, writers, bookkeepers, doctors, tax experts, etc. —jobs (28) with logical, language-related information. Those who favored the right hemisphere (29) out to be poets, politicians, musicians, architects, entrepreneurs, dancers and (30) —top executives. Herrmann’s studies showed that the most successful people in any (31) are those who use both the left and right brains.
One test for hemisphere dominance is to (32) how you turn your head and eyes when (33) questions asked by someone in front of you. Research suggests that if you generally turn to the left, you have a right-brain (34) ; if you turn to the right, (35) are you prefer work that (36) use of logic or language.
Another test for dominance involves directions for (37) a product. A left-hemisphere- oriented person usually follows instructions in a step-by-step (38) —from written sentence to written sentence. Someone with p right-side input will probably (39) the written directions and assemble the pieces by (40) the diagram or picture.
If you think you’re right-brained, (41) this teaser. Read the sentence below carefully and count the number of f’s:
FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC
STUDY COMBINED WITH THE EXPERIENCE OF MANY YEARS.
Did you find all six fs If not, don’t be surprised. Only 15 percent of those who take this test (42) .If you counted less than six—most count three—you probably (43) the f in each "of". Since "of" is pronounced "ov", the verbal left hemisphere took the verbal (44) and overrode the right, "seeing" hemisphere; (45) forcing the wrong conclusion.

A.clue

B.action

C.advice

D.offer

题型:选择题

以解决问题为中心,注重学生独立活动,着眼于思维力和意志力培养的教学模式,它是依据杜威、布鲁纳等人所提倡的“问题假设一推论验证”程序,并结合我国的一些教育工作者的教学成果归纳而成的一种教学模式是( )。

A.自学辅导式

B.传递—接受式

C.情境—陶冶式

D.引导发现式

题型:选择题

各级党组织议事原则包括()。

A.明确仪式依据

B.符合会议法定人数

C.平等议事

D.保密

E.少数人说了算

题型:选择题

半导体热敏电阻材料大多数是()。

A.金属

B.非金属

C.金属氧化物

D.碳

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