下列哪项因素有利于创伤修复和伤口愈合
A．细菌感染B．血流循环障碍C．异物存留D．局部制动E．服用皮质激素类药物
参考答案：D
存托凭证主体包括（）。
A.外国公司
B.经纪人
C.存券银行
D.托管银行
E.中央存券信托公司
Of course, there have been times, as a young man, when I got tired from study and devoted my time to playing.()
A. tired of
B. got tired of
C. tired up
D. used to tire of
