【单选题】鲍鱼是营养丰富的海鲜,它的贝壳可以做中药。你推测它应该属于( )
【单选题】青岛海鲜很有名,下列哪组海鲜都属于软体动物?
【单选题】强心苷引起心脏毒性的原理是()
A.
抑制心肌细胞膜Na + -K + -ATP酶
B.
兴奋心肌细胞膜Na + -K + -ATP酶
【简答题】A.She doesn't like tea although it's good for her health. B.She likes to drink tea for its good taste. C.She likes beef for its rich nutrition. D.She doesn't like beef at all for its taste.
【单选题】粪便常规检查应在标本采集后多长时间内完成
【简答题】青岛海鲜很有名,下列哪组海鲜都属于软体动物? A、章鱼、蛤蜊 B、鲳鱼、牡蛎 C、鲍鱼、海蛇
【单选题】一平面简谐波,沿 x 轴负方向传播 。 角频率为 w ,波速为 u 。 设 t = T /4 时刻的波形如图所示,则该波的表达式为
B.
y=Acos[ w (t-x/u)+π/2]