各种tRNA3'，末端均有的结构是
A．GGA-OH
B．CCA-OH
C．AAA-OH
D．TYA-OH
E．UUA-OH
参考答案：B
商鞅变法中的哪些内容直接废除了奴隶主贵族的特权（ ）
①奖励军功②重农抑商③为田开阡陌封疆④废分封行县制⑤实行连坐法
A．①③④
B．①②⑤
C．②③⑤
D．②③④⑤
They bought their daughter ___________ handbags as her birthday present.
A．two Shanghai leather small black
B．two leather small black Shanghai
C．two black small Shanghai leather
D．two small black Shanghai leather
