初步诊断
A．强直性脊椎炎并髋关节强直
B．髋关节化脓性关节炎
C．右髋关节结核
D．右股骨头缺血性坏死
E．右髋关节创伤性滑膜炎
参考答案：D
—What a surprise it is that you've hiked on Mount Tai!
—I didn't believe I could do it _____ I got to the top. [ ]
A. unless
B. after
C. until
D. as
排放防浪土袋时要袋口朝上或向里、袋底朝下或向外、互相叠压、上下（）。
A.对齐
B.对正
C.一致
D.错缝
