拉丁舞分为()()。
参考答案:拉丁国标舞;拉丁舞
He doesn't read the English text very often. ______ he has failed again. [ ]
A. It is why
B. That's because
C. It is reason
D. That's why
透过玻璃窗的太阳辐射中是否只有可见光,没有红外线和紫外线。