已知:a△b=3a-2b,求2△(-3)。
解:12
Nathalie suggested the problem worth paying attention__________at the meeting.
A.to be discussed
B.to been discussed
C.being discussed
D.be discussed
有关慢性胰腺炎的MRI表现,不准确的描述是()
A、主胰管串珠状扩张
B、管内有低信号的结石
C、形成薄壁均匀的假性囊肿
D、形成厚壁有壁结节的囊腔
E、胰腺普遍性萎缩