One night in February 1962, John H.
Glenn, Jr. , flew over Australia. The man in the Mercury (水星号) capsule (太空舱) was
alone, but friendly voices reached him by radio. On the dark land 100 miles
below, he saw a sprinkling (零星) of lights. They marked the city of Perth, where
people had turned on their lights as a greeting to him. In Friendship 7, Glenn radioed, "Tile lights show up very well. Thank everybody for turning them on." His capsule raced on to the east. During his three orbits of the earth, Glenn could always reach one of eighteen tracking stations. Some of them were on ships at sea. Others were in the United States. Many of the stations had been built with the help of the other countries. These countries allowed Americans to bring in radio equipment and set it up. Without the help of such lands as Nigeria, Zanz A. radio a town in Mexico B. build a power station C. orbit the earth D. fly over 60,000 miles [多选题]三相异步电动机的转速与( )有关。
A.电源频率 B.转差率 C.磁场强度 D.磁极对数 [单项选择]关于霍乱菌苗的保护作用下列说法哪项不正确()
A. 流行早期接种菌苗可缩短流行期限 B. 流行早期接种菌苗可减少急性病例,控制疾病流行 C. 接种菌苗可治疗带菌者,防止霍乱对一个地区或国家的传播 D. 接种菌苗的保护期限为3~6个月 E. 霍乱菌苗接种只能产生抗菌抗体而不能产生抗毒素抗体 [单选题]铁路机车车辆在运行中与机动车辆发生冲突,造成重伤()以下,属于一般B类事故。
A.3人 B.5人 C.8人 D.10人 [单选题]《气瓶安全技术监察规程》规定液化石油气钢瓶,每( )检验一次。
A.1年 B.2年 C.4年 [单选题]有多个告警上报时,告警处理的优先级原则为,按照设备类告警(BUS_ERR、HARD_ERR、COMM_FAIL等)、光层LOS、电层OTUk_LOF、ODUk_SSF、保护类保护倒换的优先级依次进行告警处理和排查。
A.TRUE B.FALSE [单选题]平衡挂线时,在同一相邻耐张段的同相导线可以进行的作业为( )。
A.进行紧线工作 B.进行放线工作 C.进行绝缘瓷瓶清洗 D.禁止作业 [不定项选择题]A.熄风止痉,化痰开窍,清热解毒
A.开窍醒神,化湿和胃,宁神益智 B.开窍醒神,清热消肿,止痛 C.开窍醒神,辟秽,止痛 D.开窍醒神,活血通经,消肿止痛 E.苏合香的功效是 [简答题]哪些非法低价出让国有土地使用权行为。人民检察院可以直接立案侦查?
[单选题]由于手持式电工工具在使用时是移动的,其电源线易受到拖拉.磨损而碰壳或脱落导致设备金属外壳带电,导致()。
A.触电事故 B.断电事故 C.短路事故 [单选题]《铁路旅客运输服务质量规范》(铁总运〔2016〕247号)规定:卧具叠放整齐,摆放统一,床单、头枕套、座席套、茶几布等铺设平整,干净整洁。窗帘、纱帘悬挂整齐,定型统一,(),无脱扣。
A.色调协调 B.庄重典雅 C.质地良好 D.美观大方 [单项选择]Internet上最基本的通信协议是?()
A. TCP/IP B. PPP C. DDN D. IPX/SPX 我来回答: 提交
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