题目

下列做法不符合安全用电要求的是（     ）A. 将大功率用电器的金属外壳接地B．发现有人触电时，及时切断电源   C．电灯的开关控制零线的通断  D．发现导线绝缘部分有破损时及时更换  答案：C解析:略  完形填空 　　The amount of usable water has always been of great interest in the world．　　1　　 springs and streams sometimes means control, particularly in the 　　2　　 areas like the desert．The control is possible even without possession of large areas of 　　3　　 land．In the early days of the American West, gun fights were not 　　4　　 for the water resources, and laws had to be 　　5　　 to protect the water rights of the 　　6　　 and the use of the water resources． 　　　　7　　 is known to us all, there is not 　　8　　 water in all places for everyone to use as much as he likes．Deciding on the 　　9　　 of water that will be used in any particular period 　　10　　 careful planning, so that people can manage and use water more 　　11　　．Farmers have to change their use of or demand for water 　　12　　 the water supply forecast． 　　The 　　13　　 water supply forecast is based on the water from the 　　14　　 than from the below．Interest is 　　15　　 in the ways to increase rainfall by man-made methods, and to get water from the winter snow on mountain 　　16　　．With special equipment, some scientists are studying the ways in which the mountain snow can be 　　17　　, and with the help of a repeater station, they send the 　　18　　 data to the base station．The operater at the base station can get the date at any time by 　　19　　 a button．In the near future, the forecast and use of water 　　20　　 probably depend on the advanced knowledge of snow on mountains, not of water underground． (1) [　　] A． Using B． Holding C． Owning D． Finding (2) [　　] A． dry B． distant C． deserted D． wild (3) [　　] A． fine B． beautiful C． rich D． poor (4) [　　] A． unlawful B． unacceptable C． unpopular D． uncommon (5) [　　] A． made B． designed C． signed D． written (6) [　　] A． winners B． settlers C． fighters D． supporters (7) [　　] A． That B． It C． What D． As (8) [　　] A． plentiful B． enough C． any D． much (9) [　　] A． type B． quality C． amount D． level (10) [　　] A． requests B． requires C． means D． suggests (11) [　　] A． effectively B． easily C． conveniently D． actively (12) [　　] A． leading to B． due to C． owing to D． according to (13) [　　] A． correct B． further C． average D． early (14) [　　] A． clouds B． sky C． air D． above (15) [　　] A． raising B． rising C． building D． lasting (16) [　　] A． rocks B． tips C． tops D． trees (17) [　　] A． taken care of B． made use of C． piled up D． saved up (18) [　　] A． picked B． produced C． used D． gathered (19) [　　] A． touching B． knocking C． pressing D． turning (20) [　　] A． might B． can C． will D． should