A:不等边锐角三角形
B:直角三角形
C:钝角三角形
D:等边三角形
We need to come up with a/an________and make a decision at once.
— Mom, I found that my book open on Jack's desk last night.
— Really? I couldn't believe that he to me yesterday.
山颠白雪皑皑、冰川广布的地形区是( )
新疆地区昼夜温差大,瓜果特别甜,是因为( )
谈谈《过零丁洋》颈联的“惶恐”“零丁”的双层含义。