寒滞肝脉证的临床特征是()。
A.头晕目眩,胸胁胀闷
B.少腹冷痛,睾丸坠胀
C.阴囊湿疹,外阴瘙痒
D.胁肋冷痛,得温则减
E.形寒肢冷,舌淡脉弦
参考答案:B
A snake _____________ no legs.[ ]
A. has
B. have
C. having
下述哪个气体在吸人气中容积百分比最高
A.O2B.N2C.CO2D.H2O