试比较发展中国家和西欧人口转折的不同。
以毛泽东同志为主要代表的中国共产党领导的新民主主义革命，目的是（） ["取消帝国主义在中国的特权，消灭地主阶级和官僚资产阶级的剥削和压迫","改变买办的封建生产关系，改变腐朽的上层建筑","确立以人民民主专政为核心的新的上层建筑","以上均对"]
Which two statements about FCIP and iSCSI are correct?（） [" The FCIP stack supports file-level storage for remote devices."," Both require high throughput with low latency and low jitter."," The purpose of FCIP is to provide connectivity between host and storage."," TheiSCSI stack supports block-level storage for remote devices."," The purpose ofiSCSI is to provide connectivity between separate wide-area SANs."]
生物对环境有何重大作用？
（）年，日本的千畑一郎首次在工业上应用固定化氨基酰化酶从DL-氨基酸分离L-氨基酸。
电力系统中产生铁磁谐振过电压的原因是什么？
