搜题请搜索小程序“爱下问搜题”
问题 选择题

早在1807年化学家戴维用电解熔融氢氧化钠制得钠：4NaOH（熔）4Na +O2↑+2H2O; 后来吕萨克用铁与熔融氢氧化钠作用也制得钠，反应原理为3Fe +4NaOHFe3O4+2H2↑+4Na↑。下列有关说法正确的是

[ ]

A．电解熔融氢氧化钠制钠，阳极发生的电极反应为2OH- -2e-==H2↑+O2↑

B．吕萨克法制钠的原理是利用铁的还原性比钠强

C．若戴维法与吕萨克法制得等量的钠，则两反应中转移的电子总数也相同

D．目前工业上常用电解熔融氯化钠法制钠（如上图），电解槽中石墨为阳极，铁为阴极

答案

答案：D

问答题 简答题

拖拉机中央传动的功用是什么？
查看答案
问答题

Turkey’s Bodrum peninsula is different. The tourist boom in this part of the world (1) turned some small villages into resorts yet left neighbouring beaches undisturbed, making it quite (2) southern France or the Spanish Coasts where few stretches of coastline are undevelopeD．
The (3) for this happy set of circumstances is simple. For thousands of years, travel here (4) easier by boat than by lanD．So when mass tourism arrived in the (5) 1980s, there was no coast road for ribbon development to follow. So the peninsula, just (6) hour from Bodrum airport, has not become one long littoral of resort.
The building (7) new hotels has mainly been confined to places easily reached by then relatively (8) roads. Such ease of access has made Gumbet, near Bodrum, a busy resort, while the little fishing village of Gumusluk, 12 miles further west and only recently reachable by (9) , remains tranquil and undisturbeD．
It’s worth thinking carefully about location when planning a family (10) on the peninsulA．Choose a place that is centrally located, preferably out of earshot (11) Bodrum town’s "lively"—which means nosy—nightlife, and you can then use (12) area’s comfortably small scale to your advantage. Today’s new roads mean most places can (13) reached in under an hour by taxi or the ubiquitous dolmus-minibus.
The (14) of facilities at the Tamarisk Beach Hotel near the small village of Ortakent makes (15) a good base. The family-run hotel—rooms and suites are in two-storey buildings (16) by palm trees and flowers in terracotta pots—sits above its own sandy (17) beach, shaded by tamarisk trees and sheltered by nearby islands.
The hotel is (18) child-friendly, too. Children, from infants up to young teenagers, can take part in a (19) of games and activities that include tuition in windsurfing, dinghy (20) catamaran sailing.

查看答案