圆锥是由______和一个______组成的,圆锥的侧面是一个______.
圆锥是由侧面和一个底面组成的,圆锥的侧面是一个扇形.
故答案为:侧面,底面,扇形.
---Have you seen Dr. Adams recently?
---No. He __________ Hong Kong for an important meeting. He’ll come back tomorrow.
A.has gone in
B.has been in
C.has gone to
D.has been to
已发生卒中或有TIA病史的个体预防脑卒中复发属于()。
A.缺血性脑卒中
B.出血性脑卒中
C.脑卒中一级预防
D.脑卒中二级预防
E.短暂性脑缺血发作(TIA.