内胚层将要发育为(    )。
   A．神经    B．表皮    C．肠道    D．骨骼

血管紧张素Ⅱ能使 A．ADH分泌增多 B．醛固酮分泌增多 C．血管收缩 D．渴觉增强，导致饮水 E．肾小管重吸收NaCl增多 点击查看答案

Brand R coffee costs $3. 25 per pound and brand T coffee costs $ 2. 50 per pound.Column A Column BThe number of pounds of brand R in a 1. 2mixture of brands R and T that costs $3. 00 per poundA．if the quantity in Column A is greaterB．if the quantity in Column B is greaterC．if the two quantity are equalD．if the relationship cannot be determined from the information given 点击查看答案