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{{B}}Pollution: A Life and Death Issue{{/B}} One of the main themes of Planet under Pressure is the way many of the Earth’s environmental crises reinforce one another. Pollution is an obvious example--we do not have the option of growing food, or finding enough water, on a squeaky- clean planet, but on one increasingly tarnished and trashed by the way we have used it so far. Cutting waste and clearing up pollution cost money. Yet time and again it is the quest for wealth that generates much of the mass in the first place. Living in a way that is less damaging to the Earth is not easy, but it is vital, because pollution is pervasive and often life-threatening. Air: the World Health Organization (WHO) says three million people are killed worldwide by outdoor air pollution annually from vehicles [多选题]客车内的锅炉、餐车炉灶须有<___>措施。( )
A.防火 B.防洪 C.防爆 D.防跳车 [单选题]马克思、恩格斯指出:“资产阶级的生产关系和交换关系,资产阶级的所有制关系,这个曾经仿佛用法术创造了如此庞大的生产资料和交换手段的现代资产阶级社会,现在像一个魔法师一样不能再支配自己用法术呼唤出来的魔鬼了。”这种现象在现实社会中具体表现为( )
A. 产业革命 B. 周期性经济危机 C. 席卷整个欧洲的黑死病 D. 贩卖黑奴活动 [单选题] 在室内高压设备上或某一间隔内作业时,在作业地点两旁及对面的间隔上均应设( )并悬挂"止步,高压危险!"的安全标志牌。 (1.0分)
A. 旗绳 B. 围栏 C. 标识 D. 提示牌 [简答题]论名用梵语的必要是什么？
[判断题] 电气主接线图一般以单线图表示。
A.正确 B.错误 [简答题]水枪在使用过程中,需要注意哪些问题?
[单选题]动车组重联或长编组时,工作受电弓间距为( )m。
A.200~215 m B.190~210 m C.205~215 m D.200~210 m [判断题]遂行马蜂窝摘除任务，可选择采取强摘法、冲击法、毒杀法、火烧法等摘除方法。
A.正确 B.错误 [单项选择]某电器公司经销一种家用电器，销售单价为1200元/台，单位商品变动成本为1000元/台，固定成本分摊为5万元。该家用电器的保本销售量是( )台。
A. 200 B. 250 C. 230 D. 240 我来回答: 提交
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