【简答题】小王家是新农村建设中涌现出的“养殖专业户”.他准备购置80只相同规格的网箱,养殖A、B两种淡水鱼(两种鱼不能混养).计划用于养鱼的总投资不少于7万元,但不超过7.2万元,其中购置网箱等基础建设需要1.2万元.设他用x只网箱养殖A种淡水鱼,目前平均每只网箱养殖A、B两种淡水鱼所需投入及产业情况如下表: 项目类别 鱼苗投资 (百元) 饲料支出 (百元) 收获成品鱼(千克) 成品鱼价格 (百元/千克) ...
【单选题】茶叶中的( )具有降血脂、降血糖、降血压的药理作用?
【单选题】OLAP是以数据库或数据仓库为基础的,其最终数据来源是来自底层的
【单选题】________ the tower building,where you can see the whole city
A.
Standing on the top of
C.
When you reach the top of
【单选题】听力原文: Elephants live mostly on grass, leaves and fruit. They also eat the twigs and bark of trees. The quantity of food and water which they consume is enormous, and they can be very destructive in th...
A.
Asiatic elephants are larger.
B.
African elephants do not like being exposed to the sun.
C.
African elephants prefer to live in shady places.
D.
Asiatic elephants are fond of bathing.
【单选题】除哪种材料外,以下均为胃溶型薄膜衣的材料
【单选题】下列有关碳和碳的氧化物的说法不正确的是( )
【判断题】Elephants can live as long as humans.