主页
学科
搜索
账户
常见问题
当前学科：蔬菜栽培
题目：
问答题
简述大蒜生育周期。
答案：
<查看本题扣1积分>
查看答案
答案不对？请尝试站内搜索
推荐知识点:
关于工作中可能产生的职业病危害，用人单位在与劳动者订立劳动合同时应怎样做？
裸子植物和双子叶植物根、茎的增粗生长主要是由于（）分裂活动的结果。
标志着当代护理思想和观念重大变革的是（）
中国民兵是不脱离生产的（），是中华人民共和国武装力量的组成部分，是中国人民解放军的后备力量。
关于“桐城派”下列说法正确的是哪一项？（）
以下属于影响企业外部劳动力供给因素的是（）。
原文第278条中“脾家实”是指（）
CIR设备合路器端口特性阻抗为（）。
尼日利亚国家统计局2014年4月6日公布的数据显示，该国2013年的国内生产总值（GDP）达80.3万亿奈拉（约合5099亿美元），大幅超过了2013年南非3703亿美元的GDP总量，使得尼日利亚首次超越南非成为非洲第一大经济体和世界第（）大经济体。
回答题Never laugh at a snow covered mountain! Laughter and yelling, during the avalanche season, can cause a deadly pile of snow．Huge snow slides are most common in mountains where there are steep slopes that are well buried in snow and ice．The snow builds up slowly and lands very softly．This can create a very touchy, unstable situation．Tons of snow may be held up by only the friction between snowflakes．The deep snow is like a house of cards．The slightest movement can cause it to fall．As soon as something slips, this great mass of snow will come crashing down the mountainside．Slides may be started by sound vibrations．They may also be started by the weight of wet, melting snow．Once an avalanche has been triggered, the cause no longer matters．Moving down a steep slope, it picks up great speed and added snow．Some avalanches travel as fast as two hundred miles per hour．The force of an avalanche will mow down anything in its path．Whole houses have been swallowed up by these fast-paced piles of snow．The wind that is caused by an avalanche is almost as destructive as the snow itself．Winds from an avalanche have been known to travel as fast as those of a tornado．So, when approaching a thickly snow covered mountain, speak softly!Avalanches can be started by________