已知一个直角三角形的两直角边的长恰是方程x2-7x=-12的两个根,求: (1)

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问题:

已知一个直角三角形的两直角边的长恰是方程x2-7x=-12的两个根,求:

(1)这个直角三角形的面积;

(2)求斜边上的高.

考点:一元二次方程的应用勾股定理
题型:解答题

下列离子方程式书写正确的是(  )

A.铝片放入NaOH溶液中:2Al+2OH===2AlO2+H2

B.碳酸钙溶于醋酸中:CaCO3+2H===Ca2+CO2↑+H2O

C.氯气通入NaOH稀溶液中:Cl2+2OH===Cl+ClO+H2O

D.Ba(OH)2溶液与过量NaHSO4溶液混合:H+SO42+Ba2+OH===BaSO4↓+H2O

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某单代号网络计划中,工作N与其紧后工作H和M的时间间隔分别为5周和3周,工作H和M的总时差分别为2周和6周,则工作N的总时差是()周。

A.3 

B.5 

C.7 

D.9

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( )应立即向所在地的省、自治区、直辖市(食品)药品监督管理局、卫生厅(局)以及药品不良反应监测中心报告

A.药品生产、经营企业和医疗卫生机构发现群体不良反应
B.进口药品自首次获准进口之日起满 5年
C.进口药品自首次获准进口之日起5年内
D.代理经营该进口药品的单位应于不良反应发现之日起1个月内报告国家药品不良反应监测中心
E.代理经营该进口药品的单位应于不良反应发现之日起15日内报告国家药品不良反应监测中心

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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.locate

B.recognize

C.understand

D.observe

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急性脊髓压迫症的手术治疗应抓紧时机,力争在多长时间内减压()

A.6h

B.12h

C.24h

D.36h

E.48h

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