某局部双代号网络计划如图(未标全的箭线表示其他工作),工作A的最迟开始时间( )。
A.10
B.11
C.12
D.13
参考答案:B
Questions from 36 to 40 are based on the following passage:
Against this background, the WTO faces several daunting challenges. The first is to continue bringing down tariffs on traded goods. Average penalties have fallen steadily since the GATT’s formation but even the most open economies retain lofty barriers: for instance, America still charges a tariff of 14.6% on import of clothing, five times higher than its average levy.
Resistance to tariff cuts is pest in agriculture. According to Tim Josling, a trade expert at Stanford University, tariffs and other barriers on farm goods average a crippling 40% worldwide and create distortions that “destroy huge amounts of value”. A new set of global farm talk is planned to start in 1999. At the least, you might think, these could lock in impressive reforms in Latin America and encourage further watering-down of the European Union’s Common Agricultural Policy. But they will prove difficult: squabbles over agriculture almost sank the Uruguay round.
Where does impressive reforms lock in according to the passage?().
A.America
B.Asia
C.Latin America
D.Africa
急性弥漫性增生性肾小球肾炎特点是()
A.弥漫性系膜细胞和基质增生
B.基底膜和上皮细胞间有驼峰状或小丘状致密物质沉积
C.弥漫性肾小球内大量新月体或环状体形成
D.电镜下呈弥漫性肾小球脏层上皮细胞足突消失
E.是肾病综合征的重要原因