在下列转化中必须加入还原剂才能实现的是（　　）

有学者认为：“没有伊丽莎白时代（1558—1603年）的中兴和辉煌，英国要成为世界上首次资产阶级革命和首次工业革命的发祥地，是难以想象的。”在下列英国创造的所谓“中兴和辉煌”中，属于伊丽莎白时代的是（    ）

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语法填空
    Friendship is a kind of human relationship. It is a human instinct to make friends. When ____ trouble, we need friends to offer us help, support and encouragement. With success achieved, we also need friends to share our joys.
    Friendship is also one of the greatest ____ (pleasure) that we can enjoy. It implies loyalty, cordiality, sympathy, affection and readiness to help. No man can make ____ most of his life  without ____ (careful) and conscientiously（认真地）struggling to win the right kind of friends as he ____ (go) along.
    Knowing how ____ (value) friendship is, we should be very careful in making friends. Real friends are those who have good character, superior ability and kindness of heart. Real friends can share all our sorrows and double all our joys. ____making friends, we should take care ____ (select) those who have such fine qualities. We should forgive their failures and do our best to help them. In short, when we have established friendship, we ought to cherish and treasure it ____ means of words and deeds. Only thus, can we develop real friendship and keep the sacred lamp of friendship ____ (burn) all of life.

把6molA气体和5molB气体混合放入4L密闭容器中，在一定条件下发生反应：
3A（气）+B（气） 2C（气）+_。X D（气）经5min达到平衡，此时生成C为2mol，测定D的平均反应速率为0.1mol/L•min，下列说法中错误的是  （   ）