题目内容

Heunderwentopen-heart________.

A. surgeon
B. dentist
C. medicine
D. surgery

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The nurse washed and ________the patient.

A.shaved
B.shaving
C.to shave
D.will shave

The doctors decided ________on her immediately.

A.operating
B.to operate
C.operated
D.having operated

Inaword, doctorsandnursesneedagreatdealofpatienceandmedicalknowledgetotreat andtakecareofpatients.

工程经济学产生的标志是（）

A. 《工程经济学原理》的出版
B. 《铁路布局的经济理论》的出版
C. 《工程经济学》的出版