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【判断题】
催化剂的磨损主要是由烟气中的飞灰撞击催化剂表面造成的。()A.
正确
B.
错误
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【简答题】Section B – TWO questions ONLY to be attempted Thebe Telecom is a large national telephone business in Fayland. Thebe provides telephone service to more than 11 million customers through its fixed lin...
【简答题】已知集合A={-1，0}，集合B={0，1，x+2}，且A?B，则实数x的值为______．
【简答题】National parks are large of areas of public land . They give a safe home for local plants and animal . They help keep the air and water clean . They also give us the best trips . Today ,there are near...
【单选题】In the National Zoo we can find______ animals that range from large beasts to Small birds.
A.
a species of
B.
a group of
C.
a variety of
D.
an amount of
【单选题】The national park has a large collection of wildlife, _________ from butterflies to elephants.
A.
ranging
B.
range
C.
to range
D.
ranged
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