病历摘要：患者男性，20岁，从楼梯摔倒后排不出尿8小时。体检：T37℃，P90次/分

They ___classes when the earthquake happened.

A．had

B．would have

C．were having

D．are having

When he was 20,  he left school and went to Beijing,  ________he made great progress and became

an engineer.[      ]

A. what  

B. which

C. where  

D. when

They didn't start the work _______ their teacher came back. [ ]

A. until

B. while

C. as soon as

D. if

患者女性，23岁。因心慌、心悸就诊。心脏超声如下图，可考虑为（）

A.心脏横纹肌瘤

B.心肌纤维瘤

C.心肌脂肪瘤

D.神经纤维瘤

E.心房黏液瘤

新中国成立初期，私营工商业在国民经济中还占有重要地位。为恢复和发展国民经济，争取国家财政经济的根本好转，中央采取的针对性措施是       

A．转变为国营企业

B．合理调整工商业

C．扩大企业自主权

D．全行业公私合营