用钻孔多点位移计设在钻孔内监测边坡位移时,应将锚头安装在()。
A、坚硬的岩石段;
B、软弱的岩石段;
C、各需要量测的岩石段;
D、不能移动的岩石段
参考答案:C
Mary is flying to France soon. She will arrive _____ Paris _____ the morning of July 9. [ ]
A. at, in
B. in, on
C. in, in
D. at, on
正常心肌对82Rb的首次通过摄取率,下列正确的是()
A.20%~30%
B.30%~40%
C.40%~50%
D.50%~60%
E.65%~70%