Which of the following phrases mean angry feeling?
A. hair stand on end
B. go to hell
C. send a shiver down one's spine
查看答案
Some basic emotions expressed by certain facial expressions are shared by people both in the West and the East.
A. 对
B. 错
目前已用于犬猫肿瘤治疗的药物按化学结构和来源主要分为几类？
烷化剂是最后应用在临床上的一类抗肿瘤药？
A. 对
B. 错
血中还原血红蛋白超过多少时皮肤黏膜可出现发绀( )
A. 50g/l
B. 60g/l
C. 70g/l
D. 80g/l
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