John always ______ others.
A. help
B. helping
C. helps
D. to help
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三、翻译题1.I love to spend the winter thinking about what I want to plant and placing my orders in the late winter. I enjoy cleaning out the beds in the spring and finding the little shoots coming out of the ground for next year. I love to plant annuals in my containers. I love to wander out in the mornings or evenings just to see what has grown since last time I was out. It amazes me how fast some things grow!
碘解磷定治疗有机磷中毒的主要机制是( )
A. 与结合在胆碱酯酶上的磷酰化基因结合成复合物后脱掉
B. 与胆碱酯酶结合,保护其与有机磷酸酯类结合
C. 与胆碱能受体结合,使其不受磷酸酯类抑制
D. 与乙酰胆碱结合,阻止其过度作用
E. 与游离的有机磷酸酯类结合,促进其排泄
关于中毒病的治疗不正确的是( )
A. 防止毒物吸收
B. 促进毒物排泄
C. 对症治疗
D. 使用特效解毒药
E. 使用大剂量糖和维生素C
动物亚硝酸盐中毒最有可能的原因是( )
A. 误食亚硝酸盐
B. 采食青绿饲料过多
C. 青贮饲料饲喂过多
D. 饲料调制不当
E. 医疗事故