人字抱杆的根部应保持在()上,并用钢丝绳连接牢固。
参考答案:同一水平面
Positive attitudes can not only _______ one's confidence but also improve the quality of life.[ ]
A. speed up
B. build up
C. take up
D. sweep up
The accident ______ him of his sight and the use of his legs.
A.excluded
B.disabled
C.deprived
D.gripped