I____the company two months ago.
A. leave
B. left
C. leaves
D. leaved
凡能使酶蛋白变性的物质是()
A. 抑制剂
B. 激活剂
C. 蛋白变性剂
D. 竞争性抑制剂
E. 非竞争性抑制剂
establish的名词是____?
A. unestablish
B. establishy
C. establishtion
D. establishment
急性胰腺炎时需检测的酶()
A. 转氨酶
B. 酪氨酸酶
C. 血和尿的淀粉酶
D. 胃蛋白酶
E. 胆碱酯酶