应采取措施,防止由于零序功率方向元件的电压死区导致零序功率方向纵联保护拒动,但不宜采用过分降低零序动作电压的方法。
参考答案:对
患者男性,15岁。病史7年,8岁开始出现失神发作,逐渐发作频率增加,正规口服抗癫痫药物治疗后,发作次数一度减少。12岁时,癫痫发作频繁,几乎每天发作1次,虽口服多种抗癫痫药,也无法控制。无头痛、呕吐等症状。神经科查体无阳性发现。脑电图提示:左侧颞阵发性尖波和棘慢波,以颞叶为主。颅脑MRI见下图。
宜采取的治疗策略是()
A.全脑脊髓放疗
B.手术切除
C.化疗
D.同步放化疗
E.立体定向放疗
(B)
Directions: For this part, you are allowed 30 minutes to write a composition entitled "A Brief Introduction to a Tourist Attraction". You should write at least 120 words according to the following guidelines:
Your role: a tour guide
Your audience: a group of foreign tourists
Your introduction should include:
(1) some welcoming words
(2) the schedule for the day
(3) a description of the place the tourists will be visiting (e.g. a scenic spot or a historical site, etc.)
You should make the introduction interesting and the arrangements for the day clear to everybody.