试题与答案

某学生配制一定物质的量浓度的氢氧化钠溶液后,经测定发现溶液浓度偏低.该学生得出了

题型:选择题

题目:

某学生配制一定物质的量浓度的氢氧化钠溶液后,经测定发现溶液浓度偏低.该学生得出了以下原因,其中是使溶液浓度偏低的原因的是(  )

A.容量瓶刚用氢氧化钠溶液润洗过

B.在转移溶液时不小心洒落瓶外

C.在烧杯中溶解了氢氧化钠后,趁热将溶液到入容量瓶,并迅速配成了溶液

D.定容时,俯视刻度线

答案:

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参考答案:行业寿命周期:是指一个行业由于社会的某种需求的产生而逐步产生,也随着社会的这种需求的逐步消失而消失所经历的整个过程。它一般了经历产生期、成长期、成熟期和衰退期四个阶段。运用行业寿命周期分...

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题型:填空题

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.thinking

B.pondering

C.dressing

D.having

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