相对渗透率的单位是（） ["μm2<\/sup>","mPa·s","cm","无因次"]
“我的姐姐”和“我和姐姐”表示不同语法意义，是通过下列哪种语法形式手段实现的（） ["词序","选词","虚词","词形变化"]
A slow，gradual fall of the barometer indicates approaching（）. ["gale force winds within 12 hours","blizzard conditions","deteriorating or unsettled weather","heavy，wind driven rai"]
汉语中的轻声这种现象是（） ["同化","异化","弱化","脱落"]
香菇、木耳、竹荪和灵芝的共同特征是：（） ["营养体均为有隔菌丝组成的菌丝体","它们的主要营养体都是次生菌丝体","都以锁状联合方式形成次生菌丝体","都能产生担孢子"]
什么是光抑制？
