已知a∈R,则复数z=(a2-2a+4)-(a2-2a+2)i所对应的点在第(

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问题:

已知a∈R,则复数z=(a2-2a+4)-(a2-2a+2)i所对应的点在第(    )象限,复数z对应点的轨迹是(    )。

考点:复数的概念及几何意义
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如图1-4-4是皮带传动装置的示意图.O1为主动轮,O2为从动轮,上方皮带呈水平状态.当O1匀速转动时,重10 N的物体随皮带一起运动,无相对滑动.若物体与皮带间的最大摩擦力为5 N,则(   )

图1-4-4

A.物体受到的静摩擦力为5 N

B.物体受到的静摩擦力小于5 N,但不为零

C.皮带上Q点受到的静摩擦力方向向下

D.皮带上P点受到的静摩擦力方向向上

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按贷款期限划分,公司信贷的种类有()。

A.短期贷款

B.中期贷款

C.长期贷款

D.流动资金贷款

E.透支

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慢性胎儿窘迫的处理原则是()

A.一旦确诊立即行剖宫产终止妊娠

B.一旦确诊立即引产尽早终止妊娠

C.不足月者必须等待足月后再终止妊娠

D.应考虑孕周、胎儿成熟度及窘迫程度综合作出决定

E.以上都不对

题型:填空题

北戴河海滨在河北省秦皇岛市区东南,是我国一处规模较大、风景优美、设施比较齐全的海滨避暑胜地。

题型:填空题

Low levels of literacy and numeracy have a damaging impact on almost every aspect of adults, according to a survey published yesterday, which offers (1) of a developing underclass. Tests and (2) with hundreds of people born in a week in 1958 graphically illustrated the (3) of educational underachievement. The effects can be seen in unemployment, family (4) , low incomes, depression and social inactivity.

Those who left school at 16 with poor basic skills had been employed for up to four years less than good readers (5) they reached 37. Professor John Bynner, of City University, who carried the research, said that today’s (6) teenagers would even encounter greater problems because the supply of (7) jobs had shrunk.

Almost one fifth of the 1,700 people interviewed for yesterday’s report had poor literacy and almost half (8) with innumeracy, a proportion (9) other surveys for the Basic Skills Agency. Some could not read a child’s book, and most found difficult (10) written instruction.

Poor readers were twice as likely to be a low wage and four times likely to live in a household where partners worked. Women in this (11) were five times as likely to be (12) depressed, (13) both tended to feel they had no control over their lives, and to trust others (14) .

Those who had low literacy and numeracy were seldom (15) in any community organization and less likely than others to (16) in a general election. There had been no (17) in the literary level of (18) reporting problems.

Alan Wells, the agency’s director, said: “ The results emphasize the dangers of developing an underclass people, who were out of work, (19) depressed and often labeled themselves as (20) . There is a circle of marginalization, with the dice against these people and their families.”

15()

A.revolved

B.dissolved

C.resolved

D.involved

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