原核生物RNA聚合酶识别DNA模板上转录起始点的是
A.核心酶
B.σ亚基
C.α亚基
D.β亚基
E.ρ因子
参考答案:B
肝气郁结胁痛可选方()
A.半夏厚朴汤
B.六磨饮子
C.柴胡疏肝散
D.香苏散
E.枳实导滞丸
Questions 53 to 57 are based on the following passage:(10分)To the people of ancient Egypt,life on earth was short.Life after death,however,was eternal. Therefore they built their tombs of stone and they took their possessions with them into another world. The more important the people,the greater the tomb.The Pharaohs were the rulers of the country and when they died they became gods.Many of their tombs remain,and some have become a wonder of the world.These are the pyramids.The purpose of these stone mountains was to protect the burial chamber form the weather and from thieves who might try to steal the gold,jewels and precious possessions placed there to accompany the dead ruler into eternal life.Their shape,with four triangular sides spreading from a single point,represented the rays of the sun.their position on the west bank of the River Nile was where the sun set every day and where they believed it began its journey into the other world.All the burial grounds in ancient Egypt were on the west bank of the river.
Which of the following is NOT TRUE
A.Only the important people can have the tombs of stone.
B.The Pharaohs became gods after their death.
C.Thieves might steal the precious things placed in the tombs.
D.Some pyramids have become a wonder of the world.