脱疽表现为患肢剧痛,日轻夜重,局部肿胀,皮肤紫暗,浸淫蔓延,溃破腐烂,肉色不鲜。其证候是
灰土、砂和砂石地基工程,地基承载力的检验数量每( )不应少于1点,超过3000㎡时每( )不应少于1点,每单位工程不应少于3点。
Although some countries have taken action to solve the shortage of water,it may be sometime_____ the situation improves•