【单选题】Insurance companies in China now can only invest a ( ) of 15 per cent of their assets in securities funds.在中国的保险公司最多只能用其资产的15%进行证券基金的投资。
【单选题】单选(2分) 中国从新民主主义向社会主义的过渡( )
【单选题】In bad winters, about 70 per cent of the butterflies can stay alive.
【单选题】What percentage of the earth's water can man actually use at present?
【判断题】在液压系统中,有液体重量产生的压力变化可以忽略不计。