皮皮学，免费搜题
登录
搜题
【多选题】
移动电子商务的应用层次包括( )。A.
数据处理层
B.
核心交易层
C.
包装服务层
D.
交易支持层
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】中美 Unit7 P.36-1 Kruger National Park is in South Africa. It covers an area of almost 7,332 square miles , and is one of the largest national parks in the world. It has many types of ecosystems , one o...
A.
ecosystem
B.
mammals
C.
grasslands
D.
regulations
E.
herds
F.
features
G.
square miles
【单选题】A drug that is highly effective in treating many types of infection can, at present, be obtained only from the bark of the Ibora, a tree that is quite rare in the wild. It takes the bark of 5,000 tree...
A.
The drug made from Ibora bark is dispensed to doctors from a central authority.
B.
The drug made from Ibora bark is expensive to produce.
C.
The leaves of the Ibora are used in a number of medical products.
D.
The Ibora can be propagated from cuttings and grown under cultivation.
E.
The Ibora generally grows in largely inaccessible places.
【简答题】写作。 阅读下面的短文，然后按照要求写一篇150词左右的英语短文。 There have been many types of ecological disasters caused to the Australian ecosystem by introducing other animals. The most famous one was the introduction of the ra...
相关题目：