判断题
Kepler 22b is 600 light-years away from the earth.
错误(↓↓↓ 点击‘点击查看答案’看答案解析 ↓↓↓)
单项选择题 How many high school students will become regular smokers every other day
判断题 The scientists in charge of Kepler confirmed the discovery of its first Earthlike world on Dec. 15.
单项选择题 What does "color bar" in the first paragraph mean
