读图，回答下列问题 (1)图中甲是 板块，乙是 板块，丙是______板块。 (2)C是______海，这里的面积在不断______。从图中板块运动状况推测
下列四组线段中，不构成比例线段的一组是（ ）A.1cm, 3cm, 2cm, 6cm B.2cm, 3cm, 4cm, 6cm, C.1cm, cm,cm,cm, D.1cm, 2cm, 3cm,
由动点向圆引两条切线，切点分别为，则动点的轨迹方程为 。
Let’s hope that this is the first step _____ peace. A. in B. on C. for D. towards
It was on October 1st ____ new China was founded. A. which B. when C. as D. that
After years of hearing drivers complain about scratches (划痕) on their cars, Japan’s Nissan Motor Company has officially announced the next big thing--a paint that not only resists scratches and
右图为物质出入细胞膜的示意图，请据图回答： （1）A代表 分子；B代表 ；D代表 。 （2）细胞膜的
已知ΔABC是等边三角形，点D、E分别在AC、BC边上，且AD=CE,AE与BD交于点F,则∠AFD的度数为( ) A.60° B.45° C.75° D. 70°
