–Taobao is the largest shopping website in China, _________?–Yes, it is very popular now.
A：is it
B：isn't it
C：are they
D：aren't they
多音字组词
行____ ____
薄____ ____
铁的比热容大于铜的比热容．质量相等的铁块和铜块吸收相等的热量，若吸收的热量全部转化为内能，则铁块的（ ）
