问题 选择题

我们每天都和化学变化打交道,下列叙述不是化学变化的是(  )

A.人吃进的食物逐渐被消化

B.人体的呼吸作用

C.使用煤气作燃料烧饭做菜

D.水在冰箱里结成冰

答案

A、食物逐渐被消化的过程中有新物质生成,如食物中的糖类在人体内要经过消化,最终生成被人体直接吸收的葡萄糖;属于化学变化.故选项错误;

B、人体的呼吸作用的过程中有新物质二氧化碳等生成,属于化学变化.故选项错误;

C、煤气燃烧的过程中有新物质二氧化碳等生成,属于化学变化.故选项错误;

D、水在冰箱结成冰的过程中只是水的状态发生改变,没有新物质生成,属于物理变化.故选项正确.

故选D.

单项选择题
填空题

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.