某女，67岁，胸闷气喘，病逾10年，少气不足以息，此因( )
A．肺阴虚
B．肺气虚
C．肺肾阴虚
D．痰饮停肺
E．肺肾气虚
参考答案：B
Every morning Ben's grandfather for a walk around the lake. [ ]
A. go
B. goes
C. went
D. is going
盒子里面装有6个红球，3个白球，2个黄球，任意摸一个，摸到白球的可能性是______．
