凯式带是在内皮层的()上发生的栓质化带状加厚。
A.平周壁
B.内切向壁
C.外切向壁
D.垂周壁
参考答案:D
下列哪种中药是治疗肺脾气虚,替代人参的最佳之品()
A.西洋参
B.党参
C.黄芪
D.北沙参
E.拳参
Of all the students in our class, Betty writes()
A.very carefully
B.most carefully
C.more carefully
D.the most carefully