Her voice () with excitement. A: trembled B: troubled C: trenched D: tracked

We _________ up for two hours but didn't get in. A: bumped B: braked C: queued D: tracked

In the polar regions, the dog mainly （） A: carried supplies B: provided companionship C: tracked prey D: herded caribou(驯鹿)

While traveling around Canada, foreign visitors often take the chance to ride dog sleds, tracked by Eskimo Dogs, all the way up North.

Qualifications inventories can be tracked and maintained by using all of the following EXCEPT a _______. A: ratio analysis matrix B: personnel replacement chart C: position replacement card D: skills inventory software

选择一个适当的单词或短语替换划线部分的词，确保你选择的单词或短语最好的保留原句的意思。A gunshot sounded loudly from behind the building. A: made for B: tracked down C: sprang out D: rang out

In your production database， data manipulation language （DML） operations are executed on theSALES table. You have noticed some dubious values in the SALES table during the last few days. Youare able to track users， actions taken， and the time of the action for this particular period but the changesin data are not tracked. You decide to keep track of both the old data and new data in the table along withthe user information.  What action would you take to achieve this task（） A: Apply fine-grained auditing. B: Implement value-based auditing. C: Impose standard database auditing to auditobject privileges. D: Impose standard databaseauditing to audit SQL statements.

You may know the feeling. It’s the late afternoon, and you still haven’t left the house. You’ve spent several hours on your phone, scrolling through your Facebook news feed, refreshing Twitter and watching Youtube videos. A smartphone might feel like it’s keeping you connected but it can also be a way of secluding yourself. Data from a recent study conducted by researchers at Northwestern University’s Feinberg School of Medicine found that the scenario described above—high volume of phone use and a static geographic location—could be linked to depression. The study published in The Journal of Medical Internet Research, also found that depressed people, on average, spend more time on the phone than non-depressed people. “People are likely, when on their phones, to avoid thinking about things that are troubling painful feelings or difficult relationships,” said David Mohr, one of the study’s senior authors and a professor of behavioral psychology at Northwestern, in a statement. “It’s an avoidance behavior we see in depression.” Mohr also pointed out that depressed people tend to withdraw emotionally and avoid going out—behaviors that are arguably facilitated by the constant entertainment stream available on smartphones. The study’s participants consisted of a mix of people with and without prior depression. They completed a questionnaire describing their symptoms before agreeing to have their phone use monitored for two weeks. Using GPS, the researchers tracked their location and the amount of time they spent on the phone. They were then able to identify which participants were depressed using the aggregated phone data, with 87 percent accuracy. Sohrob Saeb, a research fellow at Northwestern, said in the release that phones could be more reliable for diagnosing depression than traditional methods. In standard industry practice, patients are often asked to describe their symptoms by indicating how sad they are on a scale of 1 to 10. According to Saeb, the release reported, these responses can be rote and unreliable. In contrast, the study found, a smartphone can unobtrusively (不引人注目地) and accurately measure a patient’s daily activity, providing data that could trigger a health care provider to recognize the need for an intervention. What can be learned from the study conducted by researchers at Northwestern University?

City Parks May Mend the Mind 1 Exposure to natural settings has been linked with a vast array of human health benefits, from reduced rates of depression to increased immune functioning. Two recent studies found evidence suggesting that urban green spaces, such as parks and gardens, may also improve cognitive development and buffer the effects of health inequality. 2 In a research reported last year in the Proceedings of the National Academy of Sciences USA, investigators in Spain, Norway and the U.S. explored the cognitive development of 2,593 children between the ages of seven and ten from 36 primary schools in Barcelona. At regular intervals over a period of 12 months, they tracked changes in memory and attentiveness using cognitive tests, and they used high-resolution satellite data to assess the children’s proximity to green space at home and school and during their commute. After factoring out socioeconomic status and other potential confounders, they determined that children who were closer to parkland had better memory development and less inattentiveness than other children. 3 he study authors suggest that green spaces may have a positive effect both directly and indirectly. “Green spaces provide children with opportunities to develop mental skills such as discovery and creativity,” says co-author Payam Dadvand, a physician and researcher at the Center for Research in Environmental Epidemiology in Barcelona. More indirectly, green spaces may help by reducing exposure to air pollution and noise, increasing physical activity, and microbial from the environment, all of which have been associated with improved mental development, he says. When the researchers measured and factored in traffic-related air pollution, which is higher in places with fewer plants and trees, they found that it accounted for 20 to 65 percent of the observed association between greenness and cognitive development. Air pollution has been shown to have neurotoxic effects, Dadvand says. 4 Natural settings may also help reduce the mental health burden that comes with socioeconomic inequality, according to a paper by researchers at the University of Glasgow and the University of Edinburgh. A cross-sectional observational study published last year in the American Journal of Preventive Medicine sought to determine which neighborhood characteristics might be “equigenic,” or capable of disrupting the relation between socioeconomic disparities and health inequality. Using data from 21,294 adults living in urban areas in 34 European countries, the scientists examined associations between participants’ level of financial stress and psychological well-being. Then they explored interactions between those variables and five neighborhood characteristics or services, including access to green spaces, banking and postal services, public transportation and cultural facilities. Results show that the difference in well-being scores among people experiencing the most and least financial difficulty diminished with greater access to green spaces, such that the health was 40 percent smaller among those with better access. No such benefits were found with any of the other variables studied. 5 Approximately half of the world’s current population lives in urban areas, and that number is expected to increase, Dadvand says. Findings such as these could influence policy makers to increase access to green spaces, in the hope that doing so might boost mental health in nearby residents and improve academic achievement in children. “That could have long-term consequences for individuals, families and society as a whole,” Dadvand says. Skim the text and choose the right answers. 1. What is the text mainly about?