first quarter moon 上弦月 waxing gibbous 盈凸月 full moon 满月 waning gibbous 亏凸月 third quarter moon 下弦月 waning crescent 残月 tilt 倾斜 orbit 轨道 descending node 降交点 ascending node 升交点
解析 B。本题考查日食和月食发生的原因。选项 A“the sun moves”太阳相对是不动的。选项 C“the earth blocks the moon”这不是日食或月食发生的原因。选项 D“the stars are too far away”与日食和月食无关。选项 B“the moon blocks the sun”月球挡住太阳会导致日食,是日食发生的原因之一。
How often do total solar eclipses happen? Total solar eclipses are rare, and ones that are visible from the United States are even rarer. The events occur every one to three years somewhere around the globe, but are often only visible from Earth's poles or from the middle of the ocean...
How often do total solar eclipses happen? Total solar eclipses are rare, and ones that are visible from the United States are even rarer.The events occur every one to three years somewhere around the globe, but are often only visible from Earth's poles or from the middle of the ocean....
Yes, we know. It’d be extremely easy to choose Peter Weller’s Buckaroo Banzai for this list, but damn if we don’t laugh like 13-year-olds every time we hear these aliens tried to pass themselves off on Earth with names like John Bigboote. No Christopher Lloyd, pronouncing it Big...
As pointed out by jwodder, to be more precise the empty statement is the lack of statement between the two semicolon and could be represented by two consecutive semicolons or by semicolons separated by white space (that is including new lines). IDE like Eclipse will warn you...
How often do total solar eclipses happen? Total solar eclipses are rare, and ones that are visible from the United States are even rarer.The events occur every one to three years somewhere around the globe, but are often only visible from Earth's poles or from the middle of the ocean....