在植物叶表皮上,由保卫细胞围成的空腔叫做 ,它是植物蒸腾水分和交换的“门户”。
气孔 气体
—Did Linda see the traffic accident?
—No, no sooner ____ than it happened. [ ]
A. she had left
B. she left
C. did she leave
D. had she left
董事会应当就本次发行证券的种类和数量、发行方式、发行对象及向原股东配售的安排、定价方式或价格区间、募集资金用途、决议的有效期及其他必须明确的事项进行逐项表决。( )