Located between the 16th and the 18th floor, ______ I call my “home” is more like a “bird's nest”.
A:which
B:that
C:what
D:where
sin 163°sin 223°+sin 253°sin 313°等于( )
选择适当的关联词。
这支笔_____你的,_____小红的。( )
为了弘扬“社会主义核心价值观”,市政府在广场树立公益广告牌,如图所示,为固定广告牌,在两侧加固钢缆,已知钢缆底端D距广告牌立柱距离CD为3米,从D点测得广告牌顶端A点和底端B点的仰角分别是60°和45°.