肝硬化时，肝解毒功能下降表现为（ ）
A．男性乳腺发育
B．脾大
C．血氨升高
D．凝血因子减少
E．黄疽
参考答案：C
My 15-day-old brother is not _______ to drink water by himself.
A．enough old
B．old enough
C．too young
D．young too
某火车从车站由静止开出做匀加速直线运动，最初一分钟内行驶540m，那么它在最初10s行驶的距离是（）
A.90m
B.45m
C.30m
D.15m
