某学生在氯酸钾制氧气的实验中,错把高锰酸钾当成二氧化锰放入氯酸钾中,其结果是( )
Is it far here? A.from B.about C.for
There are three traffic lights in every country:. A.red, pink and purple B.red, yellow and green C.red, black and white
Turn right ________ the school, then go ________. A.of, straightB.at, straightC.in, straight
How do you to the zoo? A.goes B.go C.going
If you want to see a doctor, you can go to the ______. A.hospital B.library C.cinema