酪氨酸是
A．酸性氨基酸B．碱性氨基酸C．支链氨基酸D．芳香族氨基酸E．含硫氨基酸
参考答案：D
— Haven't you been to France? You speak very good French.
— ________. I just_______ French for four years in Zhejiang University. [ ]
A. No; study
B. No; studied
C. Yes; have studied
D. Yes; studied
你准备做哪项检查以明确诊断
A．胸水脱落细胞检查
B．胸CT
C．心电图心功能检查
D．腋下淋巴结病理检查
