题目内容

杂质半导体按导电类型分为()型和()型。

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在N型半导体中,多数载流子是 ;在P型半导体中,多数载流子是 。

P型半导体中定域的杂质离子呈负电,说明P型半导体带负电.。

A. 对
B. 错

Which of the following is not one of the features of patients with acute hepatitis? ( )

A. Dark urine
B. Pale stool
C. High serum level of ALT
D. High serum level of AST

What’s the main component of plasma protein in health person? ( )

Albumin
B. β-Globulins
C. Fibrinogen
D. γ- Globulins

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