下列科学家，对于第二次工业革命直接产生重大影响的是（）。
A.拉瓦锡
B.法拉第
C.达尔文
D.道尔顿
参考答案：B
.____studying Russian made his mother disappointed once again.
A．Him meaning to give up
B．His meaning giving up
C．His meaning to give up
D．He meant to give up
《北京市大型群众性活动安全管理条例》的适用范围？
