垂直位移迹象包括（）、顶部比填土面下沉、顶部高程明显降低。
A.前后错位
B.前倾后仰
C.分缝处两侧顶部出现上下错台
D.填土沉陷
参考答案：C
-There is still a copy of the book in the library. Will you go and borrow____?
-No,I'd rather buy____in the bookstore.[ ]
A．it;one
B．one;one
C．one;it
D.it;it
With a lot of difficult problems ____, the newly -elected president is having a hard time.
A．settled
B．settling
C．to settle
D．being settled
