化妆品如果不开封，保存期可达三年左右，一旦开封，都很容易坏掉，不但效果大打折扣，甚至会伤害皮肤。针对这点，精明的商家推出了小巧的化妆
Maria is in the internet, and internet makes her life more . A. iteresting; interested B.interested; interested
He became an actor at a very young age but it was nearly 20 years ______ he became famous. A. until B. when
下列事例中，一定发生了化学变化的是（ ） A．瓷碗摔碎了B．潮湿的衣服晒干了C．桌子上的苹果腐烂了D．冰箱中的水结冰了
已知双曲线与椭圆共焦点，它们的离心率之和为，求双曲线方程.
关于骨骼肌的叙述中，不正确的一项是（ ）。A．每块骨骼肌都至少跨越一个关节B．每块骨骼肌全部都是由肌肉组织构成的C．每块骨骼肌都包括了
I was born there and have known that old museum________ I was very young． A．for B．since C．because D．so
右图给出了一个“三角形数阵”。已知每一列数成等差数列， 从第三行起，每一行数成等比数列，而且每一行的公比都相等， 记第行第列
