题型:单项选择题 关于介水传染病的流行特点下列哪项是错误的()。A.水源一次严重污染后,可呈暴发流行B.多数患者发病日期集中在同一潜伏期内C.病例分布与供水范围一致D.若水源经常受污染,发病者可终年不断E.对污染源采取治理措施后,疾病的流行仍难以得到控制 查看答案
题型:完形填空 完形填空。 When it comes to eating smart for your heart, thinking about short-term fixes and simplify your life with a straightforward approach that will serve you well for years to come. Smart eating goes beyond analyzing every bite of food you lift 1 your mouth. "In the past we used to believe that 2 amounts of individual nutrients (营养物) were the 3 to good health," says Linda Van Horn, chair of the American Heart Association's Nutrition Committee. "But now wehave a 4 understanding of healthy eating and the kinds of food necessary to 5 not only heart disease but disease 6 general," she adds. Scientists now 7 on the broader picture of the balance of food eaten 8 several days or a week 9 than on the number of milligrams (毫克) of this or that 10 at each meal. Fruits, vegetables and whole grains, for example, provide nutrients and plant-based compounds 11 for good health. "The more we learn, the more 12 we are by the wealth of essential substancesthey 13 ," Van Horn continues, "and how they 14 with each other to keep us healthy." You'll automatically be 15 the right heart-healthy track if vegetables, fruits and whole grains make 16 three quarters of the food on your dinner plate. 17 in the remaining one quarter with lean meat orchicken, fish or eggs. The foods you choose to eat as well as those you choose to 18 clearly contribute to your well-being. Without a 19 each of the small decisions you make in this realm can make a big 20 on your health inthe years to come.( )1. A. between( )2. A. serious( )3. A. key ( )4. A. strict( )5. A. rescue( )6. A. in ( )7. A. turn ( )8. A. over ( )9. A. other( )10. A. conveyed( )11. A. vital( )12. A. disturbed ( )13. A. conclude( )14. A. involve ( )15. A. at ( )16. A. out ( )17. A Engage ( )18. A. delete ( )19. A. issue ( )20. A. outcome B. throughB. splendidB. pointB. differentB. preventB. uponB. put B. along B. better B. consumedB. initialB. depressed B. containB. interact B. of B. intoB. Fill B. delay B. hesitationB. function C. insideC. specificC. leadC. typicalC. forbidC. forC. focusC .withC. ratherC. enteredC. validC. amazedC .attainC. releaseC. onC. offC. InsertC. avoidC. reasonC. impactD. to D. separate D. center D. natural D. offend D. by D. carry D. beyond D. sooner D. exhausted D. racial D. amused D. maintain D. rest D. within D. up D. Pack D. spoil D. doubt D. commitment 查看答案