日本从奴隶社会向封建社会过渡的标志是_______________;伊斯兰教把_______________年定为伊斯兰教历元年。
大化改新、622 年
As Oil Declines, So does America
A. focusedB. transferred C. turned D. distracted
Abundant oil also underlay the global expansion of the country’s (42) power, as the Pentagon defended the world while becoming one of the planet’s great oil guzzlers. Its global dominion came to (43) on an ever-expanding array of oil-powered ships, planes, tanks and missiles. As long as the Middle East—and especially Saudi Arabia—served essentially as an American gas station and oil (44) a cheap commodity, all this was relatively painless. That is why the use of military force has been a (45) of American foreign policy since 1987.
哪种是麻醉性镇痛药的特征()
A.最大效能与成瘾性之比是一常数
B.长期应用其缩瞳和止泻作用首先耐受
C.兼有激动和拮抗受体的药是最弱的
D.很多效应是与脑内阿片肽类相同的
E.镇痛部位主要在感觉神经的末梢