It's said that there are plenty of hotels in that town. There ____________ be any difficulty for you to find somewhere to stay.
俄罗斯工业的特点是（ ）
下列诗句中不涉及化学变化的是
实验时应先往装钠的玻璃直管通CO2一段时间，装澄清石灰水的试管中的现象是____
