第17题: [单项选择]Students self-rating on "emotional health" and "physical health" reached all-lime lows. The reason may be ______. A. the increasing competitive pressures B. problems at home C. increasing stress D. strong interest in health protessions 参考答案:B 答案解析:文章第三段指出"Problems at home may be a cause”,即家庭内部的问题可能是导致学生身心不够健康的一个原因,同时作者近一步指出"high percentages of fr