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【单选题】
测试导入单选题9价格效应由替代效应和收入效应组成。其中,( )。A.
选择1替代效应总是正的,收入效应可正可负;
B.
选择2替代效应总是负的,收入效应可正可负;
C.
选择3收入效应总是正的,替代效应可正可负;
D.
选择4收入效应总是负的,替代效应可正可负。
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【单选题】The word 'nomadic” in the sentence 'How is this affected by whether a bird is nomadic?' can best probably mean ______.
A.
living in the north
B.
immigrant according to seasons
C.
immigrant from place to place irregularly
D.
feather changing according to seasons
【简答题】裸子植物生殖器官的演化趋势是：孢子叶由散生到聚生成各式______；大孢子叶逐渐______；雄配子体由吸器发展为______；雄配子由______发展到______；颈卵器由______发展到______。这些演化使裸子植物有可能更完善地适应______生活条件，而达到较高的系统发育水平。
【简答题】inta;floatb;charc; 若用逗号分隔各个数据,则用 scanf("____",&a,&b,&c);
【单选题】while some nomadic peoples are hunter-gatherers, most nomadic groups do not survive by foraging for food and eating wild plants and animals. The term “nomad” itself actually derives from Greek word “n...
A.
To demonstrate where nomadic peoples first originated from.
B.
To reveal an important characteristic of the nomadic lifestyle.
C.
To emphasize what an old practice nomadic pastoralism is.
D.
t o provide an insight into ancient attitudes to nomadic peoples.
【多选题】下列创建二维整型数组正确语句是：()
A.
inta[][]=newint[10,10];
B.
inta[10][10]=newint[][];
C.
inta[][]=newint[10][10];
D.
int[]a[]=newint[10][10];
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