题目

已知，在△ABC中，AB＝AC，AB的垂直平分线交直线BC于点D．当∠BAC＝40°时，则∠CAD的度数为． 答案：【1】30°用所给词的正确形式填空。1. His father worked for twenty hours without_____ (stop).2. Norman Bethune will _____ (miss)  by Chinese people forever.3. Mother bought enough food_____ (feed) our dog.4. Einstein's letter asked people_____ (give) up nuclear weapons.5. Now he is working on _____ (develop) new  machine.