IUPAC是指下列哪个组织（）。
A.国际纯粹与应用化学联合会
B.国际标准组织
C.国家化学化工协会
D.国家标准局
参考答案：A
Which of the following is true according to the passage a. The 1997 storm killed more than 250 people. b. The economic losses caused by the 1997 storm were 90.8 billionyuan. c. More than 1,800 people were wounded when the typhoon hit Zhejiang Province. d. The government evacuated 40,000 people to avoid more casualties.
按规定，起重设备在投入使用后，必须接受（）。
A．每年一次的年度检验
B．每两年一次的中间检验
C．每四年一次的换证检验
D．仅A+C
