34÷(1+34),
=34÷74,
=37;
答:男生人数占全年级人数的37.
故答案为:37.
Though it is 30 years______ we last met, I still remember the scene ______ we got separated on a rainy day.
A.since; where
B.before; which
C.since; when
D.before; where
以下哪项不属硬膜外麻醉时局麻药扩散途径()
A.膜绒毛
B.间孔
C.穿透硬脊膜、蛛网膜
D.入根都蛛网膜下隙作用于脊神经根
E.郎飞结进入脊神经根