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...
Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage.What is Winifred trying to find out A.What chemicals tears are composed of.B.Whether crying really helps us feel better.C...
Both chemicals are found only in tears that are shed in response to emotion. 这两种化学物质仅仅存在于由于情感反应而流出的眼泪中。 Tears shed because of exposure to cut onion would contain no such substance. 因切洋葱而流出的眼泪中不含有这两种物质。 Researchers at several other institutions are ...
In under 50 years, Chaoyang transformed rapidly from an “eastern wilderness” with thriving industries in agriculture, electronics, chemicals, textiles, and machinery, into a modern district. This was just the beginning.On September 1, 1985, a massive explosion in Chaoyang brought down the Beijing...
Both chemicals are found only in tears that are shed in response to emotion. Tears shed because of exposure to cut onion would contain no such substance.r institutions are investigating the usefulness of tears as a means of diagnosing human ills and monitoring drugs.contact lens fits properly ...
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. 点击查看答案&解析 单项选择题 In this section, you will hear several passages. Listen to the passage...
This is a disaster in pollution terms as treated or painted wood can release highly toxic chemicals when burned. The plan is also to "ensure that only the cleanest stoves are available for sale by 2022". But even the cleanest stove produces eight times as much pollution as a diesel truck,...
Hearing this, Leon in tears.听到这里,莱昂情绪失控,泣不成声。故选C。 【16】考查虚拟条件句。A. Although虽然;B. Whether是否;C. When既然;D. If如果。如果那巧克力是固体的,那些字就永远不会融化了,他也就不会失去最后的机会。这里是对过去的事情进行虚拟,是一个虚拟条件句,故选D。 【17】考查形容词...
These suits use aramid fibers like Nomex and Kevlar, which are both strong and fireproof, keeping firefighters safe in high-risk situations. They also have a moisture barrier layer, often made from PTFE or polyurethane, to block water and harmful chemicals. Each layer works together to provide...
like when your science teacher does a big eaperiment in class At other times, it can be pretty har d to see eryday chemistry at work, but nearly everythin g you touch or use has some element of chemi stry in it.Something as simple as toothpaste contains at least three chemicals, if...