Which of the following didn't help make jeans popular in the 1950s and 1960s？
A. TV programs.
B. Rock and roll music.
C. Rock stars.
D. Movie stars.
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Which opinion did the discovery prove？
A. Modem birds are the closest living relatives of the two-legged dinosaurs.
B. Dinosaurs have medullary bone.
C. Medullary bone is only known in ovulating birds.
D. Medullary bone is a source of calcium for birds to make shells for their eggs.
重大危险源的安全管理办法不正确的是()。
A. 生产经营单位必须对重大危险源进行登记建档
B. 对其进行评估、监控
C. 告知众人员在紧急情下采取的应急措施
D. 急时撒离所有从业人员
企业进行长期债权投资时，如果实际支付的价款中含有从发行日至购买日的债券利息，应作为“应收利息”核算。()
A. 正确
B. 错误
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