问题 单项选择题

某村一批小电镀厂其废水未做任何处理而随意排放,卜多年后,当地水井相继出现井水变苦、喝后不适等现象。两位村民在抽干井水后下至井底清理淤泥时昏倒,一位死亡,一位得救。得救的村民反映井内异味很浓,胸闷严重。

你对这起死亡事件的原因进行调查时,首先应检测

A.水中致病性微生物

B.死亡者组织样本

C.残余水中化学毒物

D.当地上壤样本

E.当地居民尿样

答案

参考答案:C

单项选择题
单项选择题

Anyone who doubts that children are born with a healthy amount of ambition need spend only a few minutes with a baby eagerly learning to walk or a headp toddler starting to talk. No matter how many times the little ones stumble in their initial efforts, most keep on trying, determined to master their amazing new skill. It is only several years later, around the start of middle or junior high school, many psychologists and teachers agree, that a good number of kids seem to lose their natural drive to succeed and end up joining the ranks of underachievers. For the parents of such kids, whose own ambition is often inseparately tied to their children’s success, it can be a bewildering, painful experience. So it is no wonder some parents find themselves hoping that ambition can be taught like any other subject at school.

It’s not quite that simple. "Kids can be given the opportunities, but they can’t be forced. " says Jacquelynne Eccles, a psychology professor at the University of Michigan who led a study examining what motivated first-and seventh-graders in three school districts. Even so, a growing number of educators and psychologists do believe it is possible to unearth ambition in students who don’t seem to have much. They say that by instilling confidence, encouraging some risk taking, being accepting of failure and expanding the areas in which children may be successful, both parents and teachers can reignite that innate desire to achieve.

Dubbed Brainology, the unorthodox approach uses basic neuroscience to teach kids how the brain works and how it can continue to develop throughout life. The message is that everything is within the kids’ control, that their intelligence is malleable.

Some experts say our education system, with its p emphasis on testing and rigid separation of students into different levels of ability, also bears blame for the disappearance of drive in some kids. Some educators say it’s important to expose kids to a world beyond homework and tests, through volunteer work, sports, hobbies and other extracurricular activities. "The crux of the issue is that many students experience education as irrelevant to their life goals and ambitions. " says Michael Nakkula, a Harvard education professor who runs a Boston-area mentoring program called Project IF (Inventing the Future), which works to get low-income underachievers in touch with their aspirations. The key to getting kids to aim higher at school is to tell them the notion that classwork is irrelevant is not true, to show them how doing well at school can actually help them fulfill their dreams beyond it. Like any ambitious toddler, they need to understand that they have to learn to walk before they can run.

The word "malleable" in Paragraph 3 most probably means ().

A. justifiable

B. flexible

C. uncountable

D. desirable