一用户在启动电脑时听见有一长两短的声音,这说明了什么()。
A.系统板故障
B.电源电压过低
C.有故障的3270键盘卡
D.视频适配器故障
参考答案:D
浸润型肺结核自然演变过程中,下列情况最常见的是 ()
A.急性血行播散
B.亚急性血行播散
C.干酪性坏死
D.空洞形成
E.引起慢性纤维空洞型肺结核
The old photo called up my memory of the small forest during my childhood, through which
________a clear stream.
A.floated
B.flowed
C.flooded
D.flew