【单选题】紫茎泽兰是一种侵占性极强的恶性杂草,原产墨西哥,后来作为观赏植物被引进欧洲、澳洲等地。近年来在我国西南部地区蔓延,所到之处粮食减产,牧草退化,人畜过敏甚至中毒。国外一些地区用紫茎泽兰的天敌食蝇来控制它的数量,因此,我国西南部地区引进这种食蝇可以抑制紫茎泽兰的危害。 以上结论是基于以下哪一项假设
A.
在国外某些地区用这种食蝇来控制紫茎泽兰比其他的方法更有效。
B.
这种食蝇能够在中国西南部地区存活下来并吃掉大量的紫茎泽兰。
C.
在中国西南部地区没有与这种食蝇相类似的昆虫。
【单选题】()是饭店按照一定的时间用期,定期向员工发放的固定报酬。
【单选题】A Tale of Scottish Rural Life Lewis Grassic Gibbon's Sunset Song (1932) was voted' the best Scottish novel of all time' by Scotland's reading public in 2005. Once considered shocking for its frank des...
B.
The beauty of the sunset.
C.
The new European world.
D.
The lives of rural Scottish farmers.
【单选题】听力原文:It's said that David suffered much this month because he narrowly escaped being arrested on charges of stealing laptop computers. (27)
A.
David was not put in jail.
B.
David escaped when the police found out that he was a thief.
C.
David was arrested because of stealing computers.
D.
David who's in charge of laptop computers escaped from being arrested.
【简答题】For the __1__ of his life, Cliff kept running. Over the years, despite increasing age and __2__ , he ___3_ many races and won a number of them. It was said that Cliff Young never kept a single __4__. ...