SLE有（）现象。
A、尿中肌酸排出量增加，血清肌酶值增高
B、抗核抗体阳性，类风湿因子阳性
C、两者均有
D、两者均无
参考答案：B
----Has your uncle come back from England for a summer holiday?
----Yes. But he _________ at home for only a few days. Now he has been back to London.
A．stayed
B．has stayed
C．had stayed
D．is staying
心脏有一结构叫卵圆窝，在什么解剖结构上（）。
A.在左房的左心耳上
B.在房间隔上
C.在肺动脉上
D.在主动脉上
E.在室间隔上
