以下对报警电话描述不正确的是()。
A. 119报警电话是免费的
B. 发生火灾时任何人都可以无偿拨打119
C. 为了演练,平时可以拨打119
在工程设计中,异步电动机的起动方式应首选全压起动,但由于各种条件限制实际使用中常常采用电抗器降压起动和自耦变压器降压起动方式。假如全压起动时起动电压即为标称电压Un,起动电流为Iq,起动转矩为Mq。电抗器降压起动时起动电压与标称电压之比为k。自耦变压器降压起动时,变压比即为起动电压与标称电压之比k。请分别回答采用电抗器和自耦起动方式的下列问题。自耦变压器降压起动时,起动电流的表达式为()。
A. kIq
B. Iq
C. k2IqIq/k
Your network consists of a single Active Directory domain. All domain controllers run Windows Server 2008 and are configured as DNS servers. A domain controller named DC1 has a standard primary zone for contoso,com. A domain controller named DC2 has a standard secondary zone for contoso,com. You need to ensure that the replication of the contoso,com zone is encrypted. You must not lose any zone data. What should you do()
A. On both servers, modify the interface that the DNS server listens on.
B. Convert the primary zone into an Active Directory-integrated zone. Delete the secondary zone.
Convert the primary zone into an Active Directory-integrated stub zone. Delete the secondary zone.
D. Configure the zone transfer settings of the standard primary zone. Modify the Master Servers lists on the secondary zone.
男性,44岁。上腹隐痛6年,加重10天。近7天呕吐,呕出物呈棕褐色。同时大便呈柏油样。24小时前患者突发腹部剧痛,烦躁不安,逐渐神志不清,四肢发凉,急症入院。入院后抢救无效死亡。尸检主要所见:腹腔内有棕褐色的浑浊液体约1L。在胃窦和小弯侧距幽门3cm处有一椭圆形溃疡,直径2.5cm,深0.7cm,溃疡底有一黄豆大贯通口,肠腔内含有柏油样粪块。镜检:溃疡底分四层,溃疡边缘黏膜上皮无明显异常。该病的诊断应是()。
A. 慢性溃疡合并穿孔
B. 慢性胃溃疡合并出血,穿孔
C. 慢性胃溃疡合并出血,穿孔,伴急性弥漫性腹膜炎
D. 慢性溃疡合并出血
E. 溃疡胃癌合并出血,穿孔,弥漫性腹膜炎