A:60°
B:65°
C:70°
D:75°
— Mom, I found that my book open on Jack's desk last night.
— Really? I couldn't believe that he to me yesterday.
下列山脉中既是地势笫一、二级阶梯界山,又是东西走向的是( )
下列句子没有语病的一项是( )