The machine can lay 3,000 bricks in eight-hours, a normal workday. That is ( ) a human bricklayer can do in the same period.

(单选题)In our country, teachers generally require students to be qu (单选题)After three hours, most of the toxins in his body had been ( (单选题)Lucy ( ) the teacher that she wrote the paper and did not (单选题)While traveling in the frontier region, he ( ) many popul (单选题)This kind woman, is our ( ) head teacher, now in a large (单选题)The homeless population in most of the country has been decl (单选题)He looks so depressed that he is not in the ( ) to go out (单选题)It is on this ( ) that say that human civilization may ha (单选题)What can be inferred from the second paragraph? ( ) (单选题)Why would we feel disappointed when we look at our to-do lis