PCEA为()。
A.病人自控镇痛
B.病人自控静脉镇痛
C.病人自控硬膜外镇痛
D.病人自控皮下镇痛
E.病人自控区域镇痛
参考答案:C
采用胚胎胸腺移植治疗有效的是().
A.选择性IgA缺乏症
B.Bruton病
C.DiGeorge综合征
D.慢性肉芽肿
E.性联低丙种球蛋白血症
开放作文。
请根据下面提示,写一篇短文。词数不少于50。
In your spoken English class, your teacher shows you the following picture. You are asked to describe the picture and explain how you understand it.
提示词:scale (n. & v.) 天平,测量
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