钢水中的表面活性元素对真空脱氮起有益作用。()
参考答案:错
15,27,47,75,(),155。
A.109
B.110
C.111
D.112
(2013·福建,21)The “Chinese Dream” is ________ dream to improve people's well-being and ________ dream of harmony,peace and development.
A.the;a
B.a;a
C.a;the
D.the;the