______方程叫做分式方程.
分母中含有未知数方程叫做分式方程;
故答案为:分母中含有未知数.
—What can you see in the picture?
—I can see a farm. And there ______ a lot of animals on it. [ ]
A. is
B. are
C. will be
D. be
新焊接的管子焊口,应按有关规定对其中的()焊口进行金属拍片检查,无影响质量的缺陷时则为合格。凡有不合格的焊口,应一律()。