（）在参观《复兴之路》展览时第一次鲜明提出实现中 * * 伟大复兴的中国梦。
A.习 * *
B.李克强
C.胡 * *
D.温 * *
参考答案：A
John shut everybody out of the kitchen ________ he could prepare his grand surprise for the party.
A．which
B．when
C．so that
D．as if
不锈钢加热到250～450℃，再缓慢冷却后，钢质变坏、硬化，出现裂纹。( )
