材料一：   列宁预言：“远东的全部外交史和经济史使人毫不怀疑，在资本主义基础上，要防止美日之间日益尖锐的冲突是不可能的。”

材料二：   20世纪50年代中期以后，阿登纳说：“如果我们欧洲不想在起了根本变化的世界上走下坡路的话，必须走向联合……否则欧洲各国将会沦为超级大国的附庸。”

材料三：   中东是世界上最为动荡的地区之一，第二次世界大战后的半个多世纪里，它一直沉浸在战火与鲜血之中。美国学者斯派克曼指出：“谁控制了边缘地带，谁就控制了欧亚大陆；谁控制了欧亚大陆，谁就掌握了世界命运。”这里的“边缘地带”几乎包括了整个中东地区。   

植物细胞是植物体生命活动的基本单位（　）。

①是学习和掌握知识的关键时期    ②是人生发展的一个新阶段

③可以为人的一生奠定重要基础    ④短暂而珍贵，要尽情玩乐，不留遗憾

根据短文内容，判断下列各句正误。

    Here's the weather report for today. It's going to be dry and windy for most of the day. Because of the wind, it's going to be cooler than usual. And the wind is going to be stronger in the evening.

    Now the report for the weekend. Our Saturday morning is going to be cloudy with little rain. And it's going to be cooler than today. In the afternoon the clouds will lift and the sun will come out. We shall have a warm evening.

    On Sunday the weather is going to change again. It's going to be fine and hot. But at noon a wind will come and it's going to be stronger in the afternoon. It's going to be a little cooler in the afternoon.

有关转基因技术安全性问题的疑虑，不正确的叙述是（    ）