选出下列词语中没有错别字的一组是( )
A:深恶痛绝 油光可鉴 抑扬顿挫 颔首低眉
B:不求胜解 诚惶诚恐 藏污纳垢 广袤无垠
C:郁郁寡欢 正襟危座 疲倦不堪 孤苦伶仃
D:暗然失色 郁郁寡欢 拖泥带水 海誓山盟
____-2=____
i是虚数单位1+i3等于( )
下列各点中既位于西半球又是南半球的是( )
—China's first large passenger plane C919 flew successfully on May 5.
—Yes. What's more, it was built on our own in Shanghai.