关于进入动物细胞内的氨基酸所发生变化的描述,正确的是[ ]
A.可以合成蛋白质
B.分解的最终产物是二氧化碳和水
C.直接合成性激素
D.经过氨基转换作用形成尿素
答案:A
______ is surprising to us is that Tom, for ______ English was once boring, can speak English fluently as though he were a native speaker.
A.What; whose
B.What; whom
C.It; whose
D.As; whom
给药间隔大,则:()
A.血药浓度波动小
B.血药浓度波动大
C.血药浓度不波动
D.血药浓度高