简述模拟定位机的主要作用?
参考答案:
①模拟各类治疗机的不同条件制定治疗计划。②进行低熔点挡块的验证。③确定靶区或危险器官的运动范围。④勾画射野及摆位参考标记。
甘草与芫花配伍,属于
A.相须
B.相使
C.相畏
D.相杀
E.相反
根据句意及汉语提示,写出各单词的正确形式,每空填一词。
1. All of the travelers live together like a big______(家庭).
2. The girl is too young to look after ________(她自己).
3. It’s generous of Julia to_________ (提供) books and stationery for the schools in the west of China.
4. Mr "Smith is such an _________ (诚实的) man that we all trust him.
5. The old lady was _________ (期待) a letter from her son while he was abroad.