管道组装焊接时,焊前预热,目的是消除内应力,预热温度为( )。
A.100℃~120℃
B.120℃~130℃
C.130℃~150℃
D.150℃~170℃
参考答案:A
Longboat, Inc. sold a luxury passenger boat from its inventory on December 31,2005 for $ 2000000. It is estimated that Longboat will incur $ 100000 in expenses servicing the warranty during its 5-year obligation. Longboat’ s tax rate is 30 percent. To account for the tax implications of the warranty obligation, Longboat should:()
A. record a decrease in taxes payable of $ 30000.
B. record a deferred tax asset of $ 30000.
C. record a deferred tax liability of $ 30000.
有人根据某种沙门菌食物中毒患者164例的潜伏期资料,用百分位数法求得潜伏期的单侧95%上限为57.8小时,其含义是()
A.大约有95人的潜伏期小于57.8小时
B.大约有69人的潜伏期大于57.8小时
C.大约有5人的潜伏期小于57.8小时
D.大约有10人的潜伏期大于57.8小时
E.大约有8人的潜伏期大于57.8小时