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VHS—c摄录一体机的视频录放电路和VHs—c型录像机的电路一样。其中在重放时,也是对色度信号进行()处理。

A. 调频
B. 调相
C. 升频
D. 降频

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加油站应依据标准、规范的相关条款进行固定作业场所的风险评价判别。判别准则可以是定性或定量的,其修订必须得到()的批准。

A. 经理
B. 安全员
C. 税务所
D. 主管领导

阅读理解:请根据短文内容,为每题确定l个最佳选项。 A New Strategy to Overcome Breast Cancer。 Post-menopausal(绝经后)women who walk for an hour a day can cut their chance of breast cancer significantly,a study has suggested. The report, which followed 73,000 women for 17 years,found walking for at least seven hours a week lowered the risk of the disease.The American Cancer Society team said this was the first time reduced risk was specifically linked to walking. UK experts said it was more evidence that lifestyle influenced cancer risk. A recent poll for the charity Ramblers a quarter of adults walk for no more than an hour a week,but being active is known to reduce the risk of a number of cancers.This study, published in Cancer Epidemiology,Biomarkers&Prevention,followed 73.615 women out of 97,785 aged 50-74 who had been recruited by the American Cancer Society between 1992 and 1993,so it could monitor the incidence of cancer in the group. They were asked to complete questionnaires on their health and on how much time they were active and participating in activities such as walking,swimming and aerobics(有氧运动)and how much time they spent sitting watching television or reading.They completed the same questionnaires at two-year intervals between 1997 and 2009. Of the women,47% said walking was their only recreational activity.Those who walked for at least seven hours per week had a 14% lower risk of breast cancer compared to those who walked three or fewer hours per week. Dr. Alpa Patel, a senior epidemiologist at the American Cancer Society in Atlanta, Georgia, who led the study, said:”Given that more than 60% of women report some daily walking, promoting walking as a healthy leisure-time activity could be an effective strategy for increasing physical activity amongst post-menopausal women.We were pleased to find that without any other recreational activity, just walking one hour a day was associated with a lower risk of breast cancer in these women.””More strenuous(紧张的)and longer activities lowered the risk even more.” Baroness Delyth Morgan, chief executive of Breast Cancer Campaign,said:”This study adds further evidence that our lifestyle choices can play a part in influencing the risk of breast cancer and even small changes incorporate into our normal day-to-day activity can make a difference.” She added:”We know that the best weapon to overcoming breast cancer is the ability to stop it occurring in the first place. The challenge now is how we turn these findings into action and identify other sustainable lifestyle changes that will help us prevent breast cancer.”It can be inferred from Dr. Alpa Patel’s study that____.

A. women have fewer chances of physical activity
B. daily walking could cut the chance of breast cancer
C. leisure-time activity is not associated with cancer risk
D. walking is not recommended for women with breast cancer

循行于上肢内侧后缘的是()

A. 手少阴心经
B. 手厥阴心包经
C. 手太阳小肠经
D. 手少阳三焦经
E. 手太阴肺经

下列哪项可以确定鼠疫的诊断()

A. 到过疫区,出现相应的各型鼠疫症状,检菌阳性
B. 有鼠疫患者接触史
C. 发热、淋巴结肿大坏死、皮肤出血
D. 突发寒战高热,面色土灰,腔道出血,皮肤出血,24h死亡
E. 患者的脓血样本接种于豚鼠,导致豚鼠死亡

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