叙述并指出下关、俞府、完骨的定位
参考答案:
下关:颧弓下缘,下颌骨髁状突之前方,切迹之间凹陷中。闭口取穴。
俞府:锁骨下缘,前正中线旁开2寸。
完骨:乳突后下方凹陷中。
植物细胞表现出全能性的必要条件是[ ]
A.给予适宜的营养和外界条件
B.导入其他植物细胞的基因
C.脱离母体后,给予适宜的营养和外界条件
D.将成熟筛管的细胞核移到去核的卵细胞内
Faced with the bad economic situation overseas, more Chinese students are returning home after studying abroad, a _______ that looks likely to continue in the coming years, a report released this week says.
A.priority
B.response
C.dilemma
D.trend