Mr Brown is very old, _____ he is still healthy. [ ]
A. but
B. and
C. so
D. for
答案:A
鹅足腱是哪些结构的联合腱
A.半腱肌
B.半膜肌
C.股薄肌
D.长收肌
E.缝匠肌
水尺零点高程测量均应采用()测量。
A、左右路线法
B、单程双转点
C、一镜双高法
D、往返