①不同的文化具有不同的地域特征　 ②两岸人民有着共同的文化认同感和归属感

③儒家思想是中华民族精神的核心和根本　④传统文化是民族生存和发展的精神纽带

试回答下列问题：

Ca²⁺能消除突触前膜内的负电荷，利于突触小泡和前膜融合，释放神经递质。若瞬间增大突触前膜对组织液中Ca²⁺的通透性，将引起的效应是 (     )

阅读题， 判断下列句子正误,。正确的写“T”,错误的写 “F”.

John: Excuse me, can I use your ruler, please?

Amy: Sure. Where is my ruler?

John: Is it in your book?

Amy: No, it isn't.

John: Is it under the desk?

Amy: No.

John: Is it on your bag?

Amy: Yes, Look! It's on my bag. Here you are!

John: Thank you.

①The ruler is John's. ____

②The ruler is in Amy's book.____

③The ruler isn't under the book.____

④John wants to use the ruler.____

⑤The ruler is on John's bag.____