问题 填空题

人的胃液里含有适量盐酸.服用含MgCO3的抗酸药可治疗胃酸过多症,有关反应的化学方程式为______;该抗酸药说明书上标明的食用方法为“嚼食”,将药片嚼碎后服用的优点是______.

答案

碳酸镁与盐酸的反应符合碳酸盐与酸的反应规律,产物回事氯化镁、水、及二氧化碳,嚼服的好处是增大了反应物的接触面积,使反应的速度变快使药效发挥的更好.

故答案为:MgCO3 +2HCl═MgCl2+CO2↑+H2O;药物与胃酸的接触面积大,反应快.

填空题
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Staying positive through the cold season could be your best defense against getting ill, new study findings suggest.

In an experiment that exposed healthy volunteers to a cold or flu virus, researchers found that people with a generally sunny character were less likely to fall ill. The findings, published in the journal Psychosomatic Medicine, build on evidence that a “positive emotional style” can help to protect us from suffering the common cold and other illnesses.

Researchers believe the reasons may be both objective — as in happiness improving immune function — and subjective — as in happy people being less troubled by a sore throat or runny nose. “People with a positive emotional style may have different immune responses to the virus,” explained lead study author Dr Sheldon Cohen of Carnegie Mellon University in Pittsburgh. “And when they do get a cold, they may interpret their illness as being less severe.”

Cohen and his colleagues had found in a previous study that happier people seemed less likely to catch a cold, but some questions remained as to whether the emotional style itself had the effect.

For the new study, the researchers had 193 healthy adults complete standard measures of personality characteristics, self-felt health and emotional style. Those who had a tendency to be happy, energetic and easy-going were judged as having a positive emotional style, while those who were often unhappy, tense and aggressive had a negative style.

The researchers gave them nasal (鼻腔的) drops containing either a cold virus or a particular flu virus. Over the next six days, the volunteers reported on any aches, pains or sneezing they had, while the researchers collected objective data. Cohen and his colleagues found that based on objective measures of nasal troubles, happy people were less likely to develop a cold.

小题1:Which is the best title for the passage? ______

A.Stay Away from Being Negative

B.Positive or Negative?It’s Up to You.

C.Emotional Style and Flu.

D.Optimistic People Likely to Keep Diseases Away.小题2: According to Dr Cohen’s research, the reason why some people are unlikely to catch a cold may be that ______.

A.their cheerful mood benefits the immune system

B.they have developed a certain way against flu virus

C.they are less likely to have a sore throat and runny nose

D.they have got a stronger self-confidence in their health小题3: The research is done by ______.

A.getting volunteers in one emotional group and analyzing them

B.conducting a medical experiment on volunteers of different emotional styles

C.collecting and analyzing volunteers’ objective nasal production data

D.having volunteers answer questions on personality, health and emotions