【名词&注释】
虚拟语气(subjunctive mood)、肠系膜上动脉(superior mesenteric artery)、过去完成时(past perfect tense)
[单选题]胆囊动脉多源于( )
A. 肝左动脉
B. 肝右动脉
C. 胃十二指肠动脉
D. 胃右动脉
E. 肠系膜上动脉
查看答案&解析
举一反三：
[单选题]One of the most important battles of the American Civil War took _________at Gettysburg, Pennsylvania, in 1863.
A. position
B. part
C. place
D. chance
[单选题]I wish I ______ you yesterday.
A. seen
B. did see
C. had seen
D. were to see
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