利用人工合成的性引诱剂诱杀害虫的雄性个体，该害虫的种群密度将明显减少，引起该现象的直接原因是（　　）

根据对话理解，选择最佳答案填空。

A: 1 I help you?

B: Yes, please! I 2 a T-­shirt.

A: A T-­shirt? What 3 do you want?

B: Red.

A: Have a look 4 this one! It's on sale.

B: Oh, it's really nice, 5 it is too short, can you give me a 6 one?

A: Ok! How about this red one?

B: En……, it's great! I like it! How much 7 it?

A: 25 dollars 8.

B: That's good. I'll 9 it.

A: Here you are!

B: Thank you 10!

下列词语中下划线的字，读音全部正确的一组是（    ）

地震发生时，下列避险措施正确的是(    )

  ①迅速跑到开阔地带  ②乘汽车逃命  ③立即躲到坚固的桌子或床下面，就地避震  ④应站着不动