基因工程药品的优点[ ]
A．价值昂贵
B．采用复杂的基因工程技术获得
C．生产效率高
D．直接利用生物特种基因
答案：C
There are ______ people in this village. [ ]
A. eight thousand and two hundred eighty-three
B. eight thousands, two hundred and eighty-three
C. eight thousand, two hundred and eighty-three
D. eight thousand, two hundred eighty-three
早闭可以反映的疾病是
A．小头畸形B．脱水C．侏儒症D．脑水肿E．甲状腺功能低下
