前列腺素是在肾脏哪一部位分泌的
A．肾皮质
B．肾皮质和髓质
C．肾 * *
D．肾盂
E．肾盏
参考答案：B
三七研末吞服，常用量是（）
A.3～10g
B.10～15g
C.30～60g
D.1～1.5g
E.15～30g
Asked suddenly about the matter ,he couldn’t an answer at once.
A．come up with
B．look for
C．put up with
D．answer for
