如图，把一块含有45°的直角三角形的两个顶点放在直尺的对边上．如果∠1＝20°，那么∠2的度数是( ) A．15° B．20°
— Did you get to the village before sunset? —No. It was already midnight. My bike________ on the way. A. broke B. has broken C.
植物落叶的现象说明 （ ） A、植物能对季节作出反应 B、植物能
The teacher expects us to do all the exercises, to study the spelling list and to get our paper ______ time.a. in b. on c. at d. by
如图所示的直角坐标系中,四边形ABCD各个顶点的坐标分别是A(0，0)，B(3，6)，C(14，8)，D(16，0)，确定这个四边形的面积.
人体内环境相对稳定有多方面表现。下列不能作为这一稳态指标的是 ( ) A．血浆pH和渗透压 B．血压、心率和血红蛋白量
父亲正常，母亲是红绿色盲患者，则女儿是红绿色盲概率为 A．50％ B．25% C．100％ D．0
Smiling is a great way to make yourself stand out while helping your body to function better. Smile to improve your health, your stress level, and your attractiveness. 61 We are drawn
