单项选择题A.-50℃.B.-68℃.C.-70℃.D.-88℃.
单项选择题A.which is very richB.with only more than one million populationC.which produces oilD.all the above
单项选择题What can you infer from the passage
单项选择题What changed Charles's life and led him into a world of natural science
单项选择题Which of the following is wrong