【简答题】甲乙两地同种商品的价格和销售量资料如表所示: 等级 单位产品价格(元) 销售额(元) 甲地 乙地 一 二 三 2.6 2.4 2.2 2600 7200 2200 2600 2400 6600 合计 --- 12000 11600 要求: (1)分别计算甲乙两地该产品的平均价格。 (2)比较哪个地区的平均价格高并说明原因。
【单选题】大面积心肌梗死导致心力衰竭的主要机制是:
【单选题】大面积心肌梗死导致心力衰竭的主要机制是()
【判断题】群落的垂直结构指的是群落的层次性,主要指群落成层现象
【单选题】How can Kevin tell whether a passenger likes talking or not?
A.
From me passenger's facial expressions.
B.
From the passenger's attitude to Kevin's job.
C.
From the first short answers they give.
D.
From Kevin's attitude to passengers.
【单选题】大面积心肌梗死导致心力衰竭的主要机制是:
【单选题】Andrea looked in the passenger‘s bag to__________ 查看材料
A.
examine what was in it
B.
find out where the passenger lived
C.
use the passenger's tools
D.
find out who the passenger was