[单选题]绝缘斗臂车绝缘臂的有效绝缘长度，110kV应大于（　　）m，且应在下端装设泄漏电流监视装置。
A.1
B.1.5
C.1.8
D.2

[单项选择]
The wet volcanic ash that covered a Maya village in Central America in about AD 595 coated and pre- served everyday objects beans, chilies, rope, gourds, even unwashed dishes -- just as they had been left, giving archaeologists a rare chance to learn about the everyday lives of the people of this pre-Columbian village. Exploration of the site, which is located in El Salvador and has been given the name Joya de Ceren, is now in its eighth season, and archaeologists are continuing to make new finds.
The volcanic eruption that entombed Ceren more than 1400 years ago began when lava pushed its way close enough to the surface to create a great explosion of steam and ash that was centered just north of the village. The archaeologists have not found the remains of any human beings killed by the eruption in Ceren, suggesting that they had enough warning to flee. The eruption buried Ceren in a layer of ash 4 to 6 m (1
A. because grasses that made up the thatched roof of the dwelling were still new, that the structure was recent
B. he left the site, located northwest of San Salvador, the capital, in 1980 unwillingly
C. by sending radar signals through the ground in order to detect buried objects, he located 22 additional structures still buried in ash
D. when the teeth were found, he said that throwing teeth on the roof is a tradition still practiced by some people in rural El Salvador today

[简答题]请分析以下案例:请结合12月4日二号线电客车误入无网区事故,阐述电客车司机在电客车误入无网区后正确的处理方式。

[填空题]
下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳标题：(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。