全国人大及其常委会在制定法律的立法程序时,第二步是()
A.法律案表决
B.法律公布
C.法律案审议
D.法律案提出
参考答案:C
_________ that he had fallen behind, he tried to work harder.
A.Realize
B.Realized
C.To realize
D.Having realized
什么是焊接的热循环?有何作用?