试题与答案

合成氨工业对国民经济和社会发展具有重要的意义。哈伯法合成氨需要在20-50MPa

题型:选择题

题目:

合成氨工业对国民经济和社会发展具有重要的意义。哈伯法合成氨需要在20-50MPa的高压和500℃的高温下,并用铁作为催化剂,氨的转化率为10%-15%;最近美国俄勒冈大学的化学家使用了一种名为trans-Fe(DMeOPrPE)2的催化剂,在常温下合成出氨。下列有关说法中错误的是

A.新的催化剂降低了反应所需要的能量

B.新法合成和哈伯法相比不需要在高温条件下,可节约大量能源

C.新法合成能在常温下进行是因为催化剂降低了反应的活化能

D.哈伯法合成氨是吸热反应,新法合成氨是放热反应

答案:

答案:D

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题型:单项选择题

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.

Why does the groundwater from the north finds its way into the canyon, but the water from the south doesn’t

A.Because there are fractures in the rocks in the south.

B.Because the southwest part of the underlying rock beds are a bit lower than those in the opposite direction.

C.Because the pressure of the upper streams forces the water to flow in from the north and flow away from the south.

D.The reason is not mentioned in the passage.

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