题干
A medical team ____（由……组成）of six doctors and twelve nurses has set out for the quake-stricken area.
答案(点此获取答案解析）
consisting/composed
__range
的图象上所有点的横坐标伸长到原来的2倍(纵坐标不变)，再将所得的图象向左平移
个单位，得到的图象对应的解析式是