概括弯制卡环转弯的要点正确的是
A．三定一控制
B．三定二控制
C．二定一控制
D．二定二控制
E．一定三控制
参考答案：A
Americans eat_____vegetables per person today as they did in 1910.
A．more than twice
B．as twice as many
C．twice as many as
D．more than twice as many
水肿型胰腺炎时可出现（）。
A.血清高铁白蛋白阴性
B.脐部及腰部皮肤呈青紫色
C.在短期内出现明显贫血
D.有手足抽搐
E.后期易发生假性囊肿
