Their water was turned off weeks ago without explanation.他们的水在几周以前就毫无理由地被切断了。The next few weeks will be a period of readjustment.接下来的几周将是适应阶段。He spent two and a half weeks with us in June 1986.1986年6月他和我们一起呆了两周半。...
It passes through the N atom and through the center of the equilateral triangle.它通过N原子及三个H原子组成的等边三角形的中心.Use your protractor to construct an equilateral triangle.用量角器作一个等边三角形。An equilateral triangle cannot be dissected in...