D Only human tears can discharge certain chemicals. 第1题 A He will tell Mary how to operate the dishwasher. B He will wash the dishes himself instead. C He will help Bill to translate the manual. D He himself will operate the dishwasher. [正确答案]:B [本题分数]:1.0分 [答案解析] ...
1What is Winifred trying to find out A.What chemicals tears are composed of.B.Whether crying really helps us feel better.C.Why some people tend to cry more often than others.D.How tears help people cope with emotional problems. 2What is Winifred trying to find out A.What chemicals tears...
lessdamagingenergysourceinthefightagainst climatechange.Intermsoftemperaturedifference perunitofenergygeneration,solarpowerhas about10timeslesseffectthanwind,andthesolar powerenergyismatureinawiderangeoffields. Butthereareotherconsiderations.Forexample, solarfarmsaredense(密集),whilethelandbetweenwindturbinescanbeco-...
①Why to invent/Why do the scientists invent it ②by exami-ning chemicals in tears③It causes no discomfort to the eye④Because it can provide care and convenience for people二、①任何时候; At any time, we should treat our friends heartto heart. In this way, we will have true friends...
places where there is music.However,this can result in social loneliness. "I used to hate parties," says Margaret,a seventy-year-old woman who only recently discovered that she was amusic.By studying people like Marga...
Nicotine and other chemicals in cigarettes and cigars can cause blood vessel damage. Nicotine and illegal drugs both increase your risk for a stroke. Ask your healthcare provider for information if you currently smoke or use drugs and need help to quit. E- cigarettes or smokeless tobacco still...
What are the signs and symptoms of a corneal abrasion?Pain, redness, or swelling of the eye Difficulty opening the eye More tears than usual A feeling that you have something in your eye Blurred vision Sensitivity to bright light HeadacheHow is a corneal abrasion diagnosed?
Eye rednesscan be helped with compounds that constrict the blood vessels in theconjunctiva. These chemicals are added to artificial tears to provide immediate relief and whitening of the eye. However, the conjunctival blood vessels can become chemically dependent on these, resulting in a drastic incr...
Other problems that can contribute to anal itching include pinworms, hemorrhoids, tears of the anal skin near the mucocutaneous junction (fissures), and skin tags(abnormal local growth of anal skin). Anal itching is conjectured to be possibly caused by irritating chemicals in foods consumed, but...
If your eyes come into contact with contaminants from harsh chemicals or their fumes, this can have an immediate or lasting effect on your eyes’ ability to produce or regulate tears. What are the ways to prevent dry eye syndrome? There are several measures you can take to prevent dry eye...