γ射束远距离治疗设备及工作场所的安全防护联锁系统的设计应遵行多重性原则,多样性原则,独立性原则。
参考答案:对
()使用数字式万用表,测电阻时可以不调零。
单词拼写:根据句子意思及所给的中文或首字母提示完成单词,请将完整的单词填写在答题卡对应的横线上。每空只能填一词。(5小题,每小题1分,共5分)
小题1: I am going to have a ______(蛋糕) for lunch.
小题2:There is a ______(钢笔) in the box.
小题3:Jim was ______(幸运的) to get a chance to study in America.
小题4: It’s hard to I ______ living in a place where there is no water.
小题5: As her bike is still here, I don’t s______ she has left.