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【简答题】
已知直线的普通方程是x-2y=1,若选取参数t=x,则直线的参数方程是 。
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【单选题】Some people are against killing wolves because ．
A.
wolves help to keep the ecological balance in the wildemess
B.
there is too small a wolf population in the wilderness
C.
there are too many deer in the wilderness
D.
wolves are afraid of people and never attack people
【简答题】The Milu deer has returned to China. At present there are not many Milu deer in nature parks in China, but the number is increasing every year. The Milu deer is a kind of deer that used to be common i...
【简答题】(A) Dragons are not real animals, but look like a combination (组合体) of many animals such as snakes, fish and deer. They have two horns (角) and a long moustache (胡子). With fantastic powers, they fly in...
【单选题】What is the main idea of the following paragraph? It is important to protect all species of animal wildlife. In areas where mountain lions and coyotes have disappeared, herds of deer have grown too la...
A.
i Coyotes are extinct
B.
ii Nature' s balance is best.
C.
iii Food shortages cause animal starvation
【单选题】Too many deer ________ and they will disappear in the near future.
A.
are being killed
B.
killed
C.
is being killed
D.
are killed
【简答题】There are many wetlands(湿地) in China and some of them have become the world’s important wetlands. The Chinese Yellow Sea Wetlands are among them. They are in Yancheng，Jiangsu Province. They are home o...
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