重力坝地基处理时，顺水流方向的开挖面不宜（）。
参考答案：向下游倾斜
.Hawking became world-famous in _______.
A．his thirties in the 1970’s
B．the thirties in his 1970
C．his 30s in 1970’s
D．the thirties during the 1970
下列哪种疾病做直肠指检，最具有重要诊断意义（）
A、肛裂
B、肛瘘
C、内痔
D、直肠癌
E、肛周脓肿
