1.What is the weather like today?答句可以说It is hot吗

1.可以.it's hot,it's cold,it's warm,it's rainy,it's cloudy,it's sunny 都很常用
2.不一定.大部分时间放在开头,但也可以将what开头的句子放进另一个句子当中：
do you know what the answer is?你知道答案吗?
does the teacher know what the answer is?老师知道答案吗?
3.beauty是名次,表示美人或美丽的东西.
That girl is a beauty.那个女孩儿是个没人
beautiful 是形容词,形容某件东西或某人很美丽,漂亮.
That song was beautiful.那首歌很动听（美丽）.
She is beautiful.她很漂亮.