某一最小项若不包含在逻辑式F中,则必在F的对偶式中( )。
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下列说法正确的是()
A. 一个逻辑函数全部最小项之和恒等于0
B. 一个逻辑函数全部最大项之和恒等于0
C. 一个逻辑函数全部最小项之积恒等于1
D. 一个逻辑函数全部最大项之积恒等于0
Para. 7M: For today’s teenagers, keeping private information hidden from parents may not be __________________ presented by using social media.S1: Many people are learning that posting certain things online can _____________ when they begin looking for jobs.S2: More than 70% of companies ________people who are looking for jobs because of what they can see about them online.
绒癌患者治疗主要方法是
A. 附件切除术
B. 子宫切除术
C. 子宫+附件全切术
D. 单纯化疗
E. 单纯放疗
不属于放疗的禁忌症的是
A. 肿瘤晚期,严重贫血,恶病质
B. 出现严重并发症
C. 伴有严重心、肺、肾疾病
D. 骨髓转移
E. 组织器官已有放射性损伤