百度试题 结果1 题目5.Air ___(contain) oxygen (氧气) and nitrogen (氮气).相关知识点: 试题来源: 解析 Air contains oxygen and nitrogen. Air是不可数名词,谓语动词用第三人称单数形式。反馈 收藏
It is found to contain 50% by mass of each element. What is the molecular formula of the compound? View Solution A Carbon compound containing only carbon and oxygen has an approximate molecular mass of 290 . On analysis it is found to contain 50 % by mass of each element . What is ...
The saturation humidity Hs is the maximum quantity of water vapor that air can contain at a given temperature, without phase separation. The relative humidity (φ or RH) is the ratio (as percentage) of the partial pressure of water vapor in air, to the vapor pressure of liquid water at ...
Outdoor and recirculated air used in air conditioning and mechanical ventilation systems contain impurities and contaminants that need to be removed for the following reasons: • To maintain an acceptable level of air purity for occupants, processes, and building equipment; • To protect the air...
Ozone is a triatomic allotrope of oxygen (a form of oxygen in which the molecule contains three atoms instead of two as in the common form) that accounts for the distinctive odor of the air after a thunderstorm or around electrical equipment. It is an ir
[46] Korra demonstrated this move too, using it to nab the driver of the truck thought to contain a kidnapped Wu toward her.[47] Thundering gust: An airbender can jab at the air around them to send it hurtling forward at incredible speed, catching even the heaviest foes and tossing ...
Clean the air - save the ocean oceans as vital providers of oxygen Environmental awareness ContactSave the oceanOur contribution to marine conservation Moisture separators use water as a natural filtration medium, and ensure clean, healthy air to breathe at the workplace. With the "Clean the Air...
a面积是36000平方公里,人口超过了20万 The area was 36000 square kilometers, the population has surpassed 200,000[translate] aA journal abstract should contain sufficient information about a trial to serve as an accurate record of its conduct and findings, providing optimal information about the trial...
The authorities determine according to their dutiful assessment (nach ihrem pflichtgemäßen Ermessen), which documents the application for the grant of permission needs to contain. In particular, an expertise concerning the suitability of the landscape and the airspace in which the aircraft ...
In general, the abovementioned types of air contain VOCs, particulate matter, water, nitrogen, oxygen, carbon dioxide, and other inert gases. Among them, VOCs cover only a small fraction and their concentrations are low. Direct measurement by mass spectrometer (MS) or sensors is nowadays availab...