To supplement high school AP-prep classes, the Web site compiles material relevant to all three subjects, including video clips, exam questions, and practice problems.
作为对原有内容的补充，课程计划网站编辑整理了诸如视频剪辑、考试真题和练习题等与这三科相关的内容。
Men operating a bicycle crank pump refuel cars at the site of a gas station in the earthquake- and tsunami-destroyed town of Minamisanriku, northeastern Japan. (AP Photo/David Guttenfelder)
日本东北部，被地震和海啸摧毁的南三陆町市。人们在一个加油站边运行一个脚踩曲轴泵给汽车加油。
Methods Recording the number of licking responses and determining the histamine content in the blood and in the skin of 4-aminopyridine (4-AP )-injected site after the induction by 4-AP injection.
方法用4氨基吡啶（4AP）诱发小鼠舔体反应与肥大细胞释放组胺，记录小鼠的舔体反应，并测定小鼠注射4 AP局部皮肤与血中组胺含量。
A number of genes that mediate cell growth, cell shape, cell movement, cell fate and cell communication frequently possess the AP-2 binding site in their cis-regulatory sequences.
许多调节细胞生长，细胞形状，细胞运动，细胞命运以及细胞通讯的基因通常在它们的顺式作用元件上拥有AP - 2结合位点。
A number of genes that mediate cell growth, cell shape, cell movement, cell fate and cell communication frequently possess the AP-2 binding site in their cis-regulatory sequences.
许多调节细胞生长，细胞形状，细胞运动，细胞命运以及细胞通讯的基因通常在它们的顺式作用元件上拥有AP - 2结合位点。
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