Have you had____ experience with sales work?
A. any
B. a
C. some
D. many
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抑制作用与底物浓度无关的是()
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
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