【单选题】He made a proposal that the problem ______ at the meeting. ( )
【判断题】标准的课题表述是“研究对象+研究方法”。
【简答题】家畜胃肠内的静脉血汇合后首先形成(),经肝门进入肝内,再经肝静脉流入()。
【简答题】家畜胃肠内的静脉血汇合后首先形成(),经肝门进入肝内,再经肝静脉流入()。
【判断题】家畜胃肠内的静脉血汇合后首先形成门静脉,经肝门进入肝内,再经肝静脉流入后腔静脉。
【简答题】黄瓜栽培中,白天在适温下,适当降低夜间温度,有利于体内营养物质的积累。有利于( )的分化。
【简答题】His proposal was that the problem (discuss) ______ at the meeting.
【单选题】Was it in 1802 when he discovered his hearing problem _____ Beethoven realized that his future ______ in composing music? [ ]