下列选项中允许用户监控各种系统资源的是( )。A．Net Watcher B．Fre

有机化合物A~H的转换关系如下所示：

请回答下列问题：

 （1）链烃A有支链且只有一个官能团，其相对分子质量在65-75之间，1 mol A完全燃烧消耗7 mol氧气，则A的结构简式是____，名称是____；

（2）在特定催化剂作用下，A与等物质的量的H₂反应生成E。由E转化为F的化学方程式是__________ ；

（3）G与金属钠反应能放出气体。由G转化为H的化学方程式是___________________________；

（4）①的反应类型是________ ；③的反应类型是____；

（5）链烃B是A的同分异构体，分子中的所有碳原子共平面，其催化氢化产物为正戊烷，写出B所有可能的结构简式_________；

（6）C也是A的一种同分异构体，它的一氯代物只有一种（不考虑立体异构），则C 的结构简式为____。

普惠制产地证中的Origin   criterion(原产地标准)一栏，应根据货物原料进口成分的比例填制，“P”表示（）

A.含进口成份

B.无进口成份

C.进口成份要在40%以下

D.进口成份要在20%以下

当一个大型及复杂项目在（）确定后，就需要制定项目计划。

A．需求定义

B．活动计划

C．项目过程

D．项目团队

Every now and then a study comes along whose chief interest lies in how peculiarly askew its findings seem to be from the common perception of things. Sometimes, of course, the "surprising new study" itself turns out to be off in some way. But if the data are fundamentally sound, then what you really want to know is why sensible people hold such a contrary view.

41___________________. Researchers took a closer look at an earlier study that had been widely interpreted, when it was first published in 2000, as proof that the homework monster was growing, and insatiable. A Time magazine cover article spawned a minigenre of trend stories, all peopled by pale, exhausted kids and bewildered boomer parents whose own homework memories seemed to encompass only felt puppets and shoe-box dioramas. But the new report points out that while the amount of time schoolchildren 12 and under devoted to study at home did indeed grow between 1981 and 1997, the increase was small: an average of 23 minutes per week. 42___________________.

So why do so many parents seem to think otherwise One answer is that the real increase in homework that has been documented is among younger children. In 1981, for instance, one-third of 6- to 8-year-olds had some homework; one-half did in the late 90’s. 43___________________.

Since children 6 to 8 are the ones we particularly like to think of as engaged in unstructured play--we imagine them riding bikes in the honeyed light of waning afternoons, even when what they might well be doing, in the absence of homework, is watching TV-homework for them seems like one of those heavy-handed incursions on the freedom of childhood.

44___________________. These children go to elite private schools or to demanding public ones where the competitive pressures are such that they either really do have hours of homework each night or take hours finishing it because they (or their parents) are so anxious that it be done well. They come from the demographic that makes a cultural, almost a. moral, ideal of enrolling children in soccer and oboe lessons and karate and ballet, and so their time really is at a premium. 45___________________.

A. Moreover, 20 percent fewer children between the ages of 9 and 12 were doing homework at all in 1997 than in 1981. And high-school students spent no more time on homework than they did in previous decades.

B. That is certainly the question raised by a Brookings Institution report released last month showing that the amount of time kids devote to homework has not, in fact, significantly increased over the last two decades.

C. Behind the seeming contradictions of steady homework levels and the anti-homework backlash, in other words, is the reality of social class.

D. They are likely to have busy professional parents, oversubscribed themselves but with an investment in seeing their children produce book reports of a kind that teachers, counselors and, in time, college admissions boards will find impressive.

E. Anti-homework crusades are not new-in 1901, for example, California passed a law abolishing homework for grades one through eight-but they have usually been led by the same kinds of people, which is to say, elites.

F. Since parents are more likely to have to supervise a first or second grader doing homework than an older child, the earlier launching of a homework regimen might feel like a disproportionate increase in the parental workload.

G. But the bigger answer, I suspect, is that the parents we tend to hear from in the press, at school-board meetings and in Internet chat groups, the parents with elaborated, developmentally savvy critiques of standards and curriculums, are parents whose children really are experiencing a time crunc

45

当个人住房贷款牌告利率发生变动，中长期个人住房贷款利率调整方式是（）。

A.下年1月1日调整

B.立即调整

C.固定利率