问题 解答题

老鼠被列为四害之首,所以老鼠是农作物的头号害虫.______.

答案

老鼠能大量糟蹋粮食,它是一种贪吃的动物,每只老鼠每天要吃掉相当于它体重的1/5的食物,据统计,全世界每年被老鼠损耗的粮食有5000万吨,损失上亿美元.食物一旦被老鼠咬过,便不宜人们食用,人吃了食物会中毒甚至染上其他鼠疫.

    所以老鼠是糟蹋粮食的头号害虫,而不是农作物的头号害虫.各种农作物有不同的害虫,如小麦的主要害虫是麦蚜虫、麦圆蜘蛛,玉米的主要害虫是玉米螟、斜纹夜蛾,棉花是棉红蜘蛛、棉铃虫等.

故答案为:×.

单项选择题
完形填空

小题1:  Such as runny noses, sore throats, nothing quite like the common cold to make you feel miserable.But experts believe that there is no link between cold weather and catching colds. 小题2:Internal Medicine expert, Dr Meenakshi Jain of Max Hospital says, “One reason could be that people are likely to stay indoors, so the virus can spread easily.小题3: ”

The common cold is a viral infection that can be caused by any of up to 250 strains of virus, the most common group of which are the rhinovirus that hit the nose.

小题4:  “They are transmitted through the nose respiratory passages, by touch, and by contact with airborne particles that are created by sneezing or coughing,” says Dr Jain.

There is no cure for the common cold and antibiotics are of no help.However, there are some precautions which can help:

      小题5: In this case, you can protect your hands from getting germs.

Don’t touch your eyes, nose and mouth, which can limit your chances of infection.

Don’t share drinking glasses or utensils with anyone as this will prevent the spread of the virus.

Make sure to eat enough fruits to boost your immune system.

A.Also the virus thrives in humidity.

B.Drink lots of fluids to avoid dehydration.

C.They are responsible for anywhere between a third and half of all common colds.

D.Get enough sleep and you’ll certainly feel better. E.So why are we particularly vulnerable(脆弱的) this season?

F.Wash your hands regularly.

G.It’s winter and you have probably noticed germs are everywhere.