下列哪种疾病只引起右心室负荷增加？（）
A.主动脉瓣关闭不全
B.阻塞性肺气肿
C.二尖瓣关闭不全
D.动脉导管未闭
E.贫血性心脏病
参考答案：B
How I wish every family _____ a large house with a beautiful garden![ ]
A. has
B. had
C. will have
D. had had
下列指令中，与进位标志位CF无关的是( )。
A．ADC AX,3FH
B．SBB BX,CX
C．DEC DX
D．ADD AL，BLDAA
