科举制度是通过分科考试选拔官吏的制度,强调以________作为选官标准的原则 [ ]
A、家世背景
B、才能
C、人品
D、修养
B
Which of the following is NOT a characteristic of an oligopoly()
A. There are few sellers.
B. High barriers to entry.
C. Relatively small economies of scale.
制作木排架时,先进行的是()。
A.安置底木
B.安置帽木
C.安夹木
D.截锯立柱