What’s the problem of gas cars?⏢ 相关知识点: 试题来源: 解析 环境污染;依赖化石燃料;能源效率低 燃油汽车的问题可拆解为三个方面分析:1. 环境污染问题。燃油车通过燃烧汽油产生动力,排放二氧化碳(温室气体主要成分)、氮氧化物(光化学烟雾成因)和颗粒物(PM2.5主要来源),根据EPA数据,运输业贡献美国29%温室...
Cars can burn through a surprisingly large amount of gas while idling, which is another reason congested city traffic can be so damaging to fuel efficiency. Another common culprit for idle engine time is people “warming up” their engines in the winter. Modern engines typically don’t require...
When a car runs out of gas, it becomes a safety hazard. In some scenarios, such as driving in the far left lane on the highway, it could be dangerous to suddenly experience sputtering and poor performance. Fuel pumps also need fuel flowing through them to stay cool; if that flow is d...
As roads are usually narrower and smaller, it is not always possible to give them a full 6 feet of room when passing them. Bike lanes are not common in Costa Rica. Additionally, in farming areas, be very aware that there may be animals on the side of the road. You may see herds of...
With prices changing almost daily, fuel is one of the most variable costs of driving a car. According to AAA, the average driver paid around 14.9 cents a mile for regular unleaded gas during a 12-month period ending in May 2024. Over a 15,000-mile year, that’s $2,235 annually just...
A car’s transmission maximizes an engine’s efficiency to reduce its fuel consumption, while still ensuring power is generated and transferred effectively. When you first press on the gas, like after waiting at a stop sign, your car’s transmission will use a lower gear ratio, which will tr...
As gas prices rise, more consumers are looking for reliable ways to save on fuel. And while some prefer to purchase cars with cruise control, others tend to focus on a particular type of vehicle, especially smart cars, since they are rumored to help driv
百度试题 结果1 题目2. What type of cars does Tesla make?a) Electric carsb) Gas-powered carsc) Solar-powered cars 相关知识点: 试题来源: 解析 a) Electric cars 特斯拉以生产电动汽车而闻名,因此答案为 a) Electric cars。反馈 收藏
The electric motor that propels the vehicle is powered by the generator, which also replenishes a battery. It uses both the cell and the generator when a lot of power is needed. Since the gas engine only produces power for the electric motor to utilize and never directly propels the wheel...
根据第一段第一句“What is the single most effective way to reduce greenhouse-gas emissions?"以及后文中的 “The answer is: make air-conditioners better”可知,减少温室气体 的最有效的办法是改善空调的冷却系统。 故选C。 6. A 推理判断题。 根据第二段第一句“Air-conditioning is one of the world...