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主题:火星上是否存在液态水
阅读
1. 火星上的条纹(streaks)可能是由陨石撞击形成的(sliding rocks)。
2. 由于火星的温度太低,阅读观点认为火星上不可能存在液态水(low temperature)。
3. 环绕火星的探测器没有检测到液态水的证据(no evidence from specialized instruments)。
听力
1. 虽然陨石撞击可以形成一些痕迹,但不可能所有的条纹都是由陨石撞击造成的,因此这些条纹更可能是水流留下的痕迹(exact position)。
2. 即使在较低的温度下,如果水中含有盐分,它仍然可以保持液态,因此火星表面的条纹可能是由于含有盐分的液态水造成的(salty water)。
3. 火星表面非常干燥,如果存在液态水,它们可能很快就会蒸发,这就是为什么探测器没有检测到液态水的原因(water below surface)。
Your professor is teaching a class on sociology. Write a post responding to the professor’s question.
In your response, you should
· express and support your personal opinion
· make a contribution to the discussion in your own words
An effective response will contain at least 100 words. You have ten minutes to write.
Doctor Diaz:In our upcoming lesson, we will explore the evolution of public health and its impact on the well-being of individuals. Considering the significant progress we've made in healthcare and nutrition, as well as the ongoing challenges such as sedentary lifestyles and stress, I'd like you to reflect on the following question: Do you believe that people are generally healthier now than they were in the past? Why or why not?
Kelly:I believe that people are generally healthier today than they were in the past, and the advancements in medical care play a significant role in longer life expectancy. With the development of new drugs and treatments, we're able to combat illnesses that were once fatal, such as various forms of cancer and heart diseases.
Andrew: While it's true that we've made incredible strides in healthcare and nutrition, the lifestyle-related health issues we face today were less common in the past. It's not just about medical advancements; it's about how we live our lives day to day. The quality of life is being compromised by our poor eating and exercise habits.