将线路两端的工频电气量(电流相位或功率方向)调制在50~300KHZ的高频()信号上

题型:单项选择题

问题:

将线路两端的工频电气量(电流相位或功率方向)调制在50~300KHZ的高频()信号上,以被保护输电线路本身为通道构成的保护称为高频保护(或称载波保护)。

A.电流

B.电压

C.电容

D.频率

考点:变电站值班员考试变电站值班员(高级)变电站值班员(高级)题库
题型:单项选择题

有2-氨基丙醇结构的是()。

A.盐酸麻黄碱

B.重酒石酸去甲肾上腺素

C.盐酸克仑特罗

D.盐酸甲氧明

E.盐酸多巴胺

题型:单项选择题

患者,女,50岁,右侧肩关节疼痛伴活动障碍,进行肩关节屈伸活动度评定。

肩关节屈曲活动范围正常参考值为()。

A.0°~60°

B.0°~90°

C.0°~120°

D.0°~150°

E.0°~180°

题型:单项选择题

心理治疗的中立原则()

A.治疗的目标是促进求助者的成长与自立

B.不能代替病人作出任何选择与决定

C.不对病人的观点进行评价

D.一般情况下不能为亲友、熟人进行治疗

E.A与B均正确

题型:单项选择题

Questions 21~25


While other members of my team explored the wreck of a small Greek merchant ship that sank off the Turkish coast more than 2,400 years ago, I hovered above them in a submarine. One diver, an archaeologist, placed an amphora, or two-handled jar, inside a lifting basket. Another vacuumed sediment from the site by fanning sand into the mouth of a nearly vertical pipe. Two more were taking measurements, carefully, but of necessity quickly, for at this depth each diver had only 20 minutes to complete the morning’s assigned task. Any longer, and they would require lengthy medical treatment, to avoid the divers’ ailment known as the bends.
In four decades of diving on shipwrecks, I’ d been too engrossed in carrying out similar tasks to think of the families whose loved ones may have disappeared long ago. I had always concentrated on the technical features of my trade. I had stopped diving regularly 15 years before this exploration, turning over the bulk of the underwater work to a younger generation, but I continue to make inspection dives on most wrecks we excavate.
This was not just any wreck. Although I’ve been involved in uncovering the remains of much older ships, and of more than a hundred ancient shipwrecks along the Turkish coast. I had never even seen a wreck from the fifth century BC. Preliminary photographs of the cargo dated it to the third quarter of the century, during the Golden Age of classical Greece. Athens, then as now the major city in Greece, controlled an empire stretching from one side of the Aegean Sea to the other. None of this would have been possible without naval might and maritime commerce.
During our three-year exploration of the wreck we excavated examples of nearly every type of jar that the classical Greeks made for wine or water. Many types might have been used as tableware by the ship’s crew, but they were far in excess of what would have been required. We concluded therefore that they must have been cargo. We also discovered in the seabed two marble discs, which we guessed were the ship’s eyes. It has long been known from vase paintings that classical Greek ships—like those from other cultures—had eyes to give them life or help them see their way through the waves. Although warships were known to have had naturalistic marble eyes attached to them, most scholars assumed that the eyes on more modest merchant ships were depicted as simple circles painted onto the sides of the vessel.
Did the sailors who depended on these eyes for safety survive the ship’s last voyage They could have lived through the actual sinking. The ship was less than a hundred yards from land when it sank, so they might have swum towards the shore. And we know from Greek literature that some ships had lifeboats. But proximity to land and having lifeboats are no guarantee of safety. Even if some had swum to shore, it’s hard to imagine that many managed to crawl up on the exposed and sharp rocks while being smashed by waves like those that almost certainly sank their ship.

What point does the writer make about the exploration in the first paragraph ______

A. It was most effective when carried out by a small team.
B. It required each diver to possess a variety of skills.
C. It had to take into account risks to the divers.
D. It had been made easier by technological developments.

题型:单项选择题

关于导购询问顾客的技巧,下列说法不正确的是:()。

A.越是顾客关心的问题,导购越要仔细询问

B.询问要先易后难,用简单的问题拉近与顾客的距离

C.在顾客回答中寻找顾客真正的需求

D.要连续发问,不给顾客思考的时间

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