假性胰腺囊肿小于（）cm可不考虑手术治疗
A.15
B.12
C.9
D.6
E.3
参考答案：D
Computers of this kind __________. They are out of stock (脱销) now.
A．sell good
B．sell well
C．are sold good
D．are sold well
具有升华性的生物碱是（）
A.喜树碱
B.蛇根碱
C.咖啡因
D.长春碱
E.毒芹碱
