根据 “However, in the end, human rubbish may only bring more harm to birds. The toxic (有毒的) chemicals in cigarettes hurt the baby birds."及本段内容可知,本段主要讲述了人类垃圾对鸟类的不良影响。 故选A。 C Scientists who study happiness have evidence(证据) to show that being kind to...
What 1 we do when we feel unhappy?There are some things that can make us happy.Experts believe that exercise can make you a_2person-but how? Exercise gives off chemicals(化学物质) in your brain(大脑). And the chemicals have something with a feeling of happi-ness. Exercise is also good...
Would you give up your morning coffee or even treats like chocolate if doing so helped the environment and the local economy? A growing number of people are willing to make such culinary sacrifices for the sake of their environmental and economic principles. They call themselves locavores...
Neurotransmitters are chemicals in the brain that carry signals that regulate bodily functions. Endorphins, for example, help to regulate a person’s mood. When a person eats chocolate, some believe that the increased production of endorphins can increase happiness, reduce stress, and decrease feeling...
Chemistry plays a crucial role in the development of new medicines. Pharmaceutical companies use chemistry and chemical processes to create drugs to cure diseases or relieve symptoms. Cleaning Products Many cleaning products we use at home contain chemicals that help remove dirt and stains. Modern che...
Some even go “all natural". They don't want _9 _ any food with chemicals (化学品).American culture is a good example of the saying, "You're what you eat." Different kinds of foods in the US show different personal tastes. Do you like American food? 10 the country and try it. ...
6. Happiness is something different for each of us and can change in different situations. 7. Because exercise gives off chemicals that make people happy. 8. Chocolate. 9. 3. / Three. / Three ways. 10. I will listen to some smooth music or read some books to relax myself. / I wil...
chemicals can be present in a food, the patient may be sensitive to multiple food chemicals and reaction more likely to occur when foods containing the triggering substance are eaten in a combined quantity that exceeds the patient's sensitivity thresholds. People with food sensitivities have ...
Do not smoke.Nicotine and other chemicals in cigarettes and cigars can trigger a migraine or make it worse. Ask your healthcare provider for information if you currently smoke and need help to quit. E-cigarettes or smokeless tobacco still contain nicotine. Talk to your healthcare provider before...
Some emulsifiers are man-made chemicals, but many stem from natural sources. The natural ones can be derived from plants, animals or aquatic sources like seaweeds, per theInternational Food Information Council(IFIC). Some foods also contain naturally occurring compounds that can act as emulsifiers...