解析 答案:4.A核心短语/词汇:through(通过)句子译文:在不同的季节,通过望远镜观察火星,颜色是怎样的?解析:本题考查常识。火星被称为红色的行星,这是因为它表面布满了氧化物,因而呈现出铁锈红色。 而gray“灰色”,different“不同的”,结合题意,排除B,C,D。故选A。
telescope标注音标并让学生猜测词意。StepPresentation第二步呈现时间13分钟OKyouhaveknownmuchaboutMarsdoyouknowpeoplecanlive教师放录音1a并设置听力任务。HowfarfromMarsWhatdoeslooklikeCanpeopleliveHowlongdoestakefromspaceship用幻灯片把问题在屏幕上打出。学生听的过程中老师将对话中几个关键的句子、短语写在黑板上。
This is known asprime-focus astrophotography. The camera isattached directlyto the telescope focus draw tube using an adapter. The focal length is determined by the type and size of the telescope’s optical design. The focal length is the ‘magnification’ of the telescope and determines the fi...
Conjunctions: These events happen when the moon appears close in its orbit to another celestial object, such as Venus, Mars, Jupiter or Saturn. High-resolution lunar photography: This technique uses a teleconverter or a telescope to capture a collage of images blended into a single image. Celest...
A typical day for an astrobiologist might involve analyzing space-telescope images or data from a satellite orbiting Mars. It might involve developing computer models or suiting up in scuba gear. It might be spent writing grants, lots of grants, to fund the work. Or it might be spent in th...
The first space stations were built to study the long-term effects of weightlessness on the human body. After all, if astronauts will ever venture to Mars or other planets, then we must know how prolonged microgravity on the order of months to years will affect their health. Space stations ...
The main engines provide the remainder of the thrust (29 percent) to lift the shuttle off the pad and into orbit. The engines burn liquid hydrogen and liquid oxygen, which are stored in the external fuel tank (ET), at a ratio of 6:1. They draw liquid hydrogen and oxygen from the ET...
why captive tigers can’t be reintroduced to the wild how covid-19 immunity compares to other diseases 5 mistakes to avoid as we try to stop covid-19 how this emergency ventilator could keep covid-19 patients alive why nasa made a helicopter for mars theoretical physicist breaks down the ...
is the project lead for Exoplanet Watch, a citizen science project to observe exoplanets, planets outside of our own solar system, with small telescopes. He is also the Science Calibration lead for the Nancy Grace Roman Space Telescope's Coronagraph Instrument, which will directly image ...
make the sun's ball the largest. One way to determine ball sizes is to imagine if the Sun was a beach ball. Mercury, Venus, Earth, Mars and Pluto would be the size of a pea. Jupiter would be softball-sized, Saturn the size of a baseball. Uranus and Neptune would be the size of...