【单选题】听力原文: No living creature, plant or animal, can exist in complete isolation. An animal is bound to depend on other living creatures, ultimately plants, for its food supply it must also depend upon the ...
A.
They eat or destroy plants.
B.
They provide plants with continued oxygen supply.
C.
Their manure is eaten by plants.
D.
Their manure improves the quality of soil which plants live on.
【单选题】某养鸡专业户饲养1 000只2~3月龄蛋鸡,4月份出现发病,病鸡很少死亡,主要表现鸡冠眼部皮肤肉垂等处有大小不一的黄色乃至黑色增生物(丘疹),有的豌豆大小,有的融合在一起,有的可剥离,有脓汁,精神食欲正常,粪便正常,如两侧眼被增生物覆盖不能采食最后死亡,该病可能是( )
【判断题】线性尺寸的数字一般应注写在尺寸线的上方,也允许注写在尺寸线的中断处。()
【简答题】线性尺寸的数字一般应注写在尺寸线的 ,也允许注写在尺寸线的 处。
【单选题】某养鸡专业户饲养1000只2~3月龄蛋鸡,4月份出现发病,病鸡很少死亡,主要表现鸡冠、眼部皮肤、肉垂等处有大小不一的黄色乃至黑色增生物(丘疹),有的豌豆大小,有的融合在一起,有的可剥离,有脓汁,精神食欲正常,粪便正常,如两侧眼被增生物覆盖不能采食最后死亡,该病可能是()
【单选题】下面程序的运行结果是( )。class Animal{ public Animal(){ System.out.println("I'm an animal."); }}class Bird extends Animal{ public Bird(){ System.out.println("I'm a bird."); }}public class AnimalTest{ ...
D.
I'm an animal. I'm a bird.
【简答题】完形填空。 Known as the Animal Lady in this area which I lived in, I was always asked to lend a hand in animal 1 . One afternoon three little neighbor girls ran up 2 my door, saying a baby squirrel was on ...
【单选题】影响消费者活动效果的个性心理特征是( )