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【判断题】
Fe的同素转变是钢铁材料能够进行热处理的内因和根据。A.
正确
B.
错误
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举一反三
【单选题】Which of the following is NOT true of the panel of the Council on Foreign Relations?
A.
There are 26 members on the panel.
B.
Its base is in New York.
C.
Its members are from Europe and the United States.
D.
It is governmental.
【单选题】What is true to the fact in America?
A.
There are more and more members in a family．
B.
There are less and less members in a family.
C.
There is an increasing number of grandparents who refuse to look after their grandchildren．
D.
There is an increasing number of grandparents who live separately from their children．
【单选题】Which of the following is true according to the text?
A.
Ashanthi needs to receive gene-therapy treatment constantly.
B.
Despite the huge funding, gene researches have shown few promises.
C.
Therapeutic genes are carried by harmless viruses.
D.
Gene-doping is encouraged by world agencies to help athletes get better scores.
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