基坑开挖坡度应根据地质条件、开挖深度、现场的具体情况确定,其原则为( )。
A.保证边坡的稳定
B.保证坑壁的稳定
C.保证开挖机具的稳定
D.保证弃土的稳定
参考答案:A
After the long journey, the three of them went back home, _________
A.hungry and tiredly
B.hungry and tired
C.hungrily and tiredly
D.hungrily and tired
绿色开花植物的生殖器官是
①根②茎③叶④花⑤果实⑥种子[ ]
A.①②③
B.④⑤⑥
C.①③⑤
D.②④⑥