根据第一段第1句Dust storms (沙尘暴) appear when strong wind blows and dirt from a dry surface.可知,沙尘暴是大风刮起干燥地表尘土时出现的,故选B。 [35题详解] 主旨大意题。根据第一段Strong dust storms may cause deaths, so you should know how
Recently, sand and dust storms have occurred in parts of northern and northwestern China. An often asked question is why this phenomenon tends to occur in spring, and how can people protect themselves against it? Sandy and dusty weather, or windstorms, typically occur when strong winds blow acr...
It spewed enough gas and dust skyward to lower the average global temperature by 0.9-1.8 F (0.5-1.0 C) [sources: Geological Society of London; Tharoor]. To this day, its name is synonymous with cataclysm. Next to a supervolcano, Krakatau is a snap cap. A packet of Pop Rocks. OK, ...
sand and dust storms will frequently take place. This phenomenon often occurs along the desert margins instead of within the deserts, where there are already no finer materials left. When a steady wind starts to blow, fine particles on the open ground will begin vibrating. As the wind picks ...
It spewed enough gas and dust skyward to lower the average global temperature by 0.9-1.8 F (0.5-1.0 C) [sources: Geological Society of London; Tharoor]. To this day, its name is synonymous with cataclysm. Next to a supervolcano, Krakatau is a snap cap. A packet of Pop Rocks. OK, ...
( D )40. What's the main idea of this passare? A. How to predict dust storms to help us keep away from dangers. B. How to prepare for cast storms. C. How to protect yourself from flying objects. D. How to protect yourself frocn dust storms. 相关知识点: 试题来源: 解析 答...
A xylem embolism, then, is similar to a human air embolism, in which air enters the bloodstream and causes potentially severe complications. The tracheids try to prevent such air bubbles and withstand the increased pressure, but that protection comes at a price: less water and, the researchers...
A power outage can be a hotel’s worst-case scenario. Given the frequent lightning storms during monsoon season, it is beneficial to install a surge protector to prevent power surges and lightning strikes from tripping your hotel’s circuit breaker and damaging the unit and other electronics with...
If you have filters on your home HVAC system, Hill suggests making sure they're up to date and high quality. Hill also recommends running the air conditioning on a recirculation setting to prevent outside air coming in. You can also recirculate the air in your car if you need to drive ...
Essentially, your HVAC air filter traps airborne contaminants to prevent them from being recirculated throughout your house. Over time, this filter gets dirty and needs to be changed. Here, we’ll examine HVAC filters more closely to help you determine how often you should change your air filt...