看起来好像正在下雨一样。as if引导的表语从句中的谓语部分通常用虚拟语气,如果谓语部分的的动作是真实的或者有可能发生时,用陈述句语序。该句子的主语告诉我们“空气中充满了灰尘”,所以只是看上去像是在下雨,虚拟语气部分所表达的是正在进行的动作,用be动词+V-ing,be动词用were。故选择答案D。
309K Air pressure, temperature, and density are the most influential weather variables. Explore what adiabatic processes are and how clouds, air masses, fronts, and storms form. Related to this QuestionWhat is air pressure measured in? What is the instrument for measuring air pressure? What is...
The air quality in the city, ___is shown in the report, has improved over the past two months. A.that B.it C.as D.what
Log In Sign Up Subjects Science What is the air density doing when the weather forecast says the pressure is rising?Question:What is the air density doing when the weather forecast says the pressure is rising?Understanding Air Pressure...
The density of air at ordinary atmospheric pressure and 25°C is 1.19g/L.What is the mass, in kilograms, of the air in a room that measures 10.0*14.0*10 ft? Express your answer using two significant figures. 相关知识点: 试题来源: 解析 在常温常压下,气体的密度为1.19g/L.,现在房间的...
Handheld digital density meters measure the sample at ambient temperature. If a result is needed at a certain temperature, the digital density meter can apply a correction factor to the measured result to compensate the result to a defined temperature. Each measurement takes only a few s...
本句的难点是as引导的非限制性定语从句将主句分割成了两部分,如果把句子转换成isshowninthereport,theairqualityinthecityhasimprovedoverthepasttwomonths.就明了了。as指代主句整句内容,且在从句中作主语,意为“正如”,故选C。 练习册系列答案 课课练与单元测试系列答案...
1.The air quality in the city. is shown in the report.has improved over the past two months.( )A.thatB.itC.asD.what
If performance falls below the AIR, payments will decrease in size. Performance is always measured against the AIR, not past performance. What It's Based On An annuity payment is based on the number of annuity units owned by the investor, multiplied by the annuity unit value. When ...
The equation is: ρ = p / RT where: ρ is the air density in kg/m3 p is the absolute pressure in Pa T is the absolute temperature in K R is the specific gas constant for dry air in J/(kg·K) or is 287.058 J/(kg·K). ...