【单选题】815年,唐宪宗削藩,李师道派遣杀手嵩山僧人圆净一行在长安城刺杀了宰相()
【单选题】关于双级精馏塔获取纯氧和纯氮的说法正确的是( )
B.
双级精馏塔可在上塔顶部和底部同时获得纯氮气和纯氧气;
C.
双级精馏塔可以在冷凝蒸发器的蒸发侧取出液氮;
【单选题】At first, Australia was settled by the British as a colony
A.
to receive free settlers.
B.
to supply Britain with wool and food.
C.
to receive convicts from Britain.
D.
to expand the British imperial power.
【单选题】Who were me natives of Australia before the arrival of the British settlers?
【单选题】---I’m sorry I ______ my exercise book at home. ---Don’t forget _______ it to school tomorrow, please.