填土路堤分几个作业段施工时,两个相邻段交接处不在同一时间填筑,则先填段应按1:1坡度分层留台阶。
参考答案:对
The little girl couldn't work the problem out. She wasn't ______ clever.[ ]
A. that
B. much
C. enough
D. too
成人型多囊肾描述错误的是()
A.为肾集合肾小管及肾单位的囊状扩张
B.属常染色体隐性遗传疾病
C.临床上表现为慢性进行性肾功能损害
D.一般从30~40岁开始发病
E.常伴有肝囊肿