Iron, nickel, copper, silver, gold, iridium , or ruthenium may be included as cocatalyst metals.铁 、 镍 、 铜, 银 、 金, 铱或钌,可用作复合催化剂金属.Countermeasures: join waxes cocatalyst so that the ink stick are shorter, withdrawal.对策: 加入...
He's been a trade union activist for many years.多年来他一直是工会的积极分子.Louise Otto - Peters, German writer , feminist, poet and women's rights activist.路易莎·奥托-彼得,德国女权运动的先驱, 作家, 诗人.Now she is an activist for homeless pe...