The word 'footnote'(Line 1, Paragraph 1)means that the influenza in 1957
A．was less important in American medical history.
B．imposed little influence on American population.
C．was less serious in terms of death toll.
D．got less attention of American medical experts.

判断题文法的任意两个符号对之间都存在简单优先关系。()

未分类题Why have venture capitalists found it difficult to invest in wind power?A．Investment in the wind power market is highly risky.B．Development of wind power calls for new technologies.C．Wind power industry did not develop as fast as expected.D．Investment in wind power may not be so cost effective.

判断题叠音词色彩鲜明，富有美感，声情并茂，有它独特的修辞效果，在写诗词歌赋时，犹为古今作者所喜用。()

未分类题According to Mr. Greco, SWWPs new tribuneA．has already dominated the 'off-grid' market.B．will fail in the grid-connected market.C．is inclusive, economical and easy to operate.D．will become a more profitable product than others.

单项选择题我国在制度中正式将“待业救济金”改为“失业保险金”是在()