诊断肺炎球菌性肺炎最有价值的是
A．寒战、高热B．脉搏增快C．语颤增强D．咯铁锈色痰E．呼吸困难
参考答案：D
Growing up ________ Michael Jordan was in his prime，Beijing native Wu You knew what he wanted to do.
A．since
B．when
C．until
D．before
影响行业进入障碍的因素有哪些？
