33. 若忽略基極電流，則此BJT放大器的集極偏壓電流Ic為何？ (A) 2mA (B) 2.3mA (C) 2.6mA (D) 2.9mA

3. Which statement best explains why alanine aminotransferase (ALT) is more specific than aspartate aminotransferase (AST) for hepatocellular injury? (A) ALT is located exclusively in hepatocyte mitochondria (B) AST has a longer plasma half‑life than ALT (C) ALT is predominantly cytosolic and has limited expression in extrahepatic tissues (D) ALT requires pyridoxal phosphate, whereas AST does not