【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...
【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...