Tư bản có hao phí lao động cá biệt thấp hơn hao phí lao động xã hội thì sẽ không thu giá trị thặng dư tương đối mà thu được giá trị thặng dư siêu ngạch. ĐÚNG HAY SAI Ạ , CÓ THỂ GIẢI THÍCH giúp em được không ạ

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.

think its caste system

explanation:

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.