【单选题】In this victory speech ________ before a huge crowd of his supporters, Obama declared that “Change has come to America”.
【多选题】成本会计机构内部的组织分工有( )两种基本方式
【多选题】镇痛药的镇痛机制是
A.
通过脑内释放脑啡肽等物质与突触后膜阿片受体结合,使痛觉传递受抑制
B.
通过中枢某部位释放抑制性递质NM-DA、Ach增加对痛觉的抵抗力,产生镇痛
C.
通过脑内释放脑啡肽等物质与突触前膜阿片受体结合,产生突触前抑制,防止痛觉传入
D.
与相应膜受体结合,关闭Ca抖通道,阻断痛觉传递
【简答题】在呼伦贝尔草原上生活着草类、野兔、羊、狼等生物。据此回答下列问题: (1)冬天,草类减少,兔子的数量_________,狼的数量_________。春天雨量充沛,草类增多,此时兔子等草食动物的数量_________,狼的数量_________。在一般情况下,这些生物的数量在一年中虽然有些变化,但总是维持相对稳定的状态,这种现象叫_________。 (2)为了保护人畜的安全,当地牧民曾组织过大规模...
【多选题】The structures taking part in( )
B.
septum primum and septum secundum
C.
muscular and membranous part of interventricular septum
D.
bulboventricular groove
E.
left and right bulbus ridges
【单选题】The writer asked about the price of a glass butter-dish in Change Alley because he wanted to___.
A.
buy it at a lower price
B.
change his dish for something else
C.
find out if the shop assistant is polite
D.
compare the prices of the dish in two stores
【判断题】萃取塔正常操作时,两相的速度必须高于液泛速度。