A. 骨髓 B. 胸腺 D. 法氏囊 F. 周围免疫器官 H. 淋巴结
A. 只做加法运算 B. 只做算术运算 C. 算术运算与逻辑运算 D. 只做逻辑运算
A. 50 B. 60 C. 100 D. 20
A. ships of above 200 GT to MARPOL B. every ship of 400 GT and above C. all ships D. ships of more than 200 GT but less 400 GT