David手术是指（）

[单选题]David手术是指A.升主动脉人工血管替换和主动脉瓣置换术B.升主动脉、主动脉窦置换保留主动脉瓣C.升主动脉、主动脉瓣置换和冠状动脉开口移植术D.主动

[单选题]D．avid Copperfield is a novel by ______.A．Charles DickensB．William M. ThackerayC．George EliotD．Mrs. Gaskell

[单选题]Professor David Morton of the department is involved ______animal research and is concerned ______reducing animal suffering as much as possible.A． to…withB． in…inC． with…inD． in…with

[单选题]D．avid threatened ______ his neighbor to the police if the damages were not paid.A． to be reported B. reporting C. to report D. having reported

[单选题]The professor asked a question，and David______a good answer.A．put up withB．stood up forC．came up withD．looked down upon

[单选题]2001年美国David先生去世了，David先生个人财产240万美元，David太太个人财产50万美元，David夫妇夫妻共同财产120万美元，统一

[单选题]What is David probably going to do？A．To meet Linda. B.To call a doctor. C.To get some medicine.

[单选题]D．avid did ________it to annoy her.A．on purposeB．in needC．in detailD．at all

[单选题]What is one of the problems that David is facing now?A． He is too young to get a credit card.B． He has no time to learn driving.C． He has very little spare time.D． He will soon lose his job.

[单选题]Why was David able to get the job in the company?A． He had done well in all his exams.B． He had written some computer programs.C． He was good at playing computer games.D． He had learnt to use computers at school.