为防止煤气串入蒸汽或氮气管内,只有在()时,才能把蒸汽或氮气管与煤气管道连通,停用时应断开或堵盲板。
A、生产
B、通蒸汽或氮气
C、检修
参考答案:B
甲、乙两个形状未知的容器的底面积之比为S甲:S乙=4:3,两容器内盛有同一种液体,如果两容器底面积所受的液体压力相等,则( )
A.甲、乙两容器内液体的深度之比h甲:h乙=4:3
B.甲、乙两容器底面所受液体的压强之比P甲:P乙=3:4
C.甲、乙两容器内液体的重力之比GA:GB=4:3
D.甲、乙两容器内液体的重力之比GA:GB=3:4
Renowned U. S. economist, John Rutledge, who helped frame the fiscal policies of two former U. S. presidents, warned that an abrupt rise in China’ s currency could lead to another Asian financial crisis. The founder of Rutledge Capital told the media that if the yuan rises (1) it would discourage foreign direct investment in China while (2) by market speculators. Currency change is more difficult for investors and (3) .The Chinese currency has appreciated by (4) since July 2005 when the country allowed the yuan to (5) within a daily band of 0.3 percent. The analysts are expecting the currency to rise (6) by the end of this year. But if the yuan rose 20 to 30 percent, as some U. S. politicians are demanding, it would (7) causing a recession and deflation. Similar advice to allow an abrupt appreciation of a currency led to (8) in 1997, and came very close to destroying (9) . The U. S. economist says that investors want foremost to (10) associated with large fluctuations in currency and inflation. They (11) after evaluating risks to benefits such as (12) . A rising yuan would drive up labor costs for foreign investors and would not (13) .Earlier reports said that currency speculators had pumped (14) U.S. dollars into China by the end of last year, with another 70 billion U. S. dollars (15) in the first three months of this year. There is no way to (16) of this type of investment and many economists disagree that (17) is so high. Instead of further appreciating its currency, China should make the yuan (18) . If the yuan were more easily converted into foreign currencies it would allow Chinese companies to expand overseas, (19) , and provide management experience and capital that China needs. It would also (20) and reduce speculative money coming into the country.