PNP管大多为锗管,其发射结的正向压降一般为()V。
A.0.2~0.3
B.0.4
C.0.6~0.7
D.0.5
参考答案:A
小脑囊实性肿瘤,壁结节轻度强化,周围轻度水肿,最可能的诊断是:
A.囊性星形细胞瘤
B. 室管膜瘤
C.髓母细胞瘤
D.血管网状细胞瘤
E.囊性转移瘤
Within the context of the UN Convention on Contracts for the International Sale of Goods, explain:
(a) how an offer may be accepted; (5 marks)