A.外始式B.内始式C.内起源D.外起源根毛发育来源于根表皮细胞，其来源为（）……

判断题回归测试是在软件修改后再次运行以前为查找错误而执行程序曾用过的测试用例。

填空题Paul（）（like）his Chinese teacher because she is too strict with him.

填空题Those young trees（）（die）because they couldn’t get enough water.

填空题The Wangs live in a beautiful（）（build）with a big garden.

填空题Old Henry is over eighty but he is still in good（）（healthy）.