宏观经济学以整个社会活动作为考察对象,研究国民经济生产、分配、( )的总量、结构、运行及其变化。
A.供给和需求B.收入和支C.交换和消费D.交换和需求
参考答案:C
用所给词的正确形式填空。
1.________ (luck), our team tried our best but could never win the first prize.
2.The policeman told the boys________(not play)football near the road. .
3.Don't make the baby _________( cry ) again.
4.I am taller than him,and I am the ________(slim) of all the students.
5. If you eat too much_________ (health)food, you may be ill.
下列有关化学与生活的说法中,正确的是[ ]
A.误食重金属盐中毒后,立即服用鸡蛋清解毒
B.对于人体的必需元素摄入量越多越有利于人体健康
C.维生素在人体内需要量很小,它不属于人体的营养素
D.合金、合成纤维和合成橡胶等都是重要的有机合成材料