What does "Purple" air quality mean? If conditions worsen, then air quality alert could be upgraded to a "Code Purple" in some areas, which means pollution in the air is "very unhealthy" and the risks of health effects increase for everyone. The air ...
( )2.WhydoesKéréusuallyusebricksmadeoflocalclayandcement? A.Tomakebuildingsstronger. B.Tokeepcoolinhotweather. C.Toprotectstudentsfromrain. D.Toensurebetterindoorairflow. ( )3.WhatdidNébilaprobablythinkofKéré?swiningthePritzker? A.Touchingandimpressive. B.Amazingandunexpected. C.Deservingandfortu...
9.Whatdoestheunderlinedword”perils”inParagraph3mostprobablymean? A.Dangers. B.Self-drivingcars. C.Pedestrians. D.Human-drivencars. 10.Inwhichaspectcanself-drivingcarsbeathuman-drivencars? A.Drivingsteadily. B.Climbingsteepslopes. C.Evaluatingthecostofloss. D.Makingcomplexdecisions. 11.Whereisthete...
The AQI is used for reporting daily air quality. It tells you how clean or polluted the air is, and what associated health effects might be a concern for you. How does the AQI work? Think of the AQI as a thermometer that runs from 0 to 500. The higher the value, the greater the ...
When pollutants cause the air you breathe to become unhealthy or even hazardous, public officials may issue code red or purple alerts telling people to stay indoors based on the U.S. Air Quality Index.
97. What does the underlined phrase “tipped my hat” in paragraph 3 mean? A.Expressed my gratitude. B.Proved my determination. C.Relieved the tiredness. D.Showed my respect.98. What is the last paragraph mainly about? A.Admiration for the climbers. B.Concern about the risk. C....
AirNow.govprovides air-quality information based on your location. It also includes a map of surrounding regions and a forecast for the following day’s AQI. The FOX Weather app also provides you with air-quality data based on your location. ...
百度试题 结果1 题目What was the weather like this morning in the city? A. It rained。 B. The air quality was bad. C. It was a beautiful D. ay。 相关知识点: 试题来源: 解析 B 反馈 收藏
3. What does the visit in China mean to the author? A.A turning point.B.A fun experience. C.A health alarm.D.A life-and-death test. 4. What's the main reason for the author to continue her adventures now? A.To relax herself.B.To broaden her mind. ...
lingering above the heads of millions of Americans as Canada's wildfires continue to rage, there has been a whirlwind of information about the severity of the situation. But when officials and forecasters classify your city's air as "unhealthy" or "hazardous," what does that really mean?