皮皮学，免费搜题
登录
搜题
【单选题】
下面选项中关于规模经济描述不正确的是( )。A.
因为生产范围的扩大带来的成本下降的趋势
B.
专业化分工和协作的经济性是其产生的来源
C.
由于生产规模的扩大而带来的单位成本呈下降的趋势
D.
可分为产品规模经济、工厂规模经济和企业规模经济这三个主要层次
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【多选题】关于淋巴结副皮质区,哪项正确
A.
是一片弥散的淋巴组织
B.
位于淋巴小结与髓质之间
C.
含有毛细血管后微静脉
D.
是B细胞聚集区
E.
细胞免疫功能活跃时，此区明显扩大
【单选题】The fire was finally brought under control, but not______ heavy damage had been caused.
A.
before
B.
after
C.
since
D.
until
【单选题】The fire was finally________in Jilin on June 3.Unfortunately,119 people lost their lives.I hope the accident like this won’t happen again．
A.
put out
B.
put away
C.
put up
D.
put on
【多选题】关于淋巴结副皮质区,正确的是
A.
是一片弥散的淋巴组织
B.
位于淋巴小结与髓质之间
C.
含有毛细血管后微静脉
D.
细胞免疫功能活跃时，此区明显扩大
E.
是B细胞聚集区
【单选题】The fire was finally ______ after the building had ______ for two hours.
A.
put off; caught fire
B.
put away; been on fire
C.
put out; been on fire
D.
put out; caught fire
【单选题】The fire was finally after the building had been on fire for two hours.
A.
put off
B.
put away
C.
put out
D.
put up
相关题目：
参考解析：
知识点：
题目纠错 0
发布
