More and more of the world’s population are living in towns or cities. The speed at which cities are growing in the less developed countries is (1) . Between 1920 and 1960 big cities in developed countries (2) two and a half times in size, but in other parts of the world the growth was eight times their size.
The (3) size of growth is bad enough, but there are now also very (4) signs of trouble in the (5) of percentages of people living in towns and percentages of people working in industry. During the nineteenth century cities grew as a result of the growth of industry. In Europe the (6) of people living in cities was always smaller than that of the (7) working in factories. Now, however, the (8) is almost always true in the newly industrialised world: (9). Without a base of people working in industry, these cities cannot pay for their growth; (10) There has been little opportunity to build water supplies or other facilities. (11), a growth in the number of h
下述情况选用何种方法为最宜？
高血压患者，夜间出现阵发性呼吸困难，近二周未用过洋地黄制剂（）| If you are tired of watering your
plants every day, you might want to try growing them right in the water. And in
fact this is not a new idea: People in ancient Egypt were growing plants without
soil more than 2,000 years ago. Moreover, the floating gardens of the Aztecs in
early Mexico are another ancient example of gardening without soil. Nowadays
this technique is widely used. It is called hydroponic gardening. Literally, the term hydroponics means cultivating in water rather than in soil, and in fact normal soil is not used in this process. But plants are plants, and so the concerns of the hydroponic gardener are really much the same as those of any other farmer. Even when they do not grow in soil, all plants need food, stability, oxygen, and protection from disease. The main nutrients required by plants are nit A. Plants that are grown without soil do not need food. B. The roots as well as the leaves of all plants must be able to breathe. C. When plants are grown close together there is less of a chance for disease. D. Soil is a much cleaner planting medium than hydroponic gardening. [单选题]飞行时间在任何7个连续日历日内不得超过?????????小时,如果在连续7个日历日内,如果在每次飞行中均有机会在经批准的睡眠区得到休息,则这一飞行时间限制可以增加吗? 试题种类: 驾驶员晋级理论题库
A.35、可以 B.40、可以 C.35、不可以 D.40、不可以 [判断题]银团费用仅限为借款人提供相应服务的银团成员享有。（）
A.正确 B.错误 [单项选择]关于NA的合成，下列哪种描述是错误的( )。
A. 多巴胺脱羧生成NA B. 多巴在囊泡外生成多巴胺 C. 酪氨酸羟化酶使酪氨酸变成多 D. 酪氨酸是合成NA的前体 E. NA合成限速步骤在酪氨酸羟化酶反应 [单选题]架空避雷线线最大风速时与建筑物间的最小水平距离( )mm。(1分)
A.500 B.1000 C.1500 D.2000 [多选题]焊接作业区中对人体健康有害的因素主要是( )。
A.高温 B.辐射 C.烟尘 D.有毒气体 [单项选择]麻杏甘石汤证之喘是因为（）
A. 风寒束表，肺气失宣 B. 外邪入里，邪热壅肺 C. 饮停中焦，上逆犯肺 D. 肠热壅盛，上蒸迫肺 E. 素有喘病，外感引发 [单项选择]病人肢体软弱无力，行动不灵而无痛者，属（）
A. 痿病 B. 痹病 C. 痫病 D. 虚风内动 E. 小儿惊风 我来回答: 提交
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