情景对话（根据首字母）。

Mike: Good morning, Tom, How are you?

Tom: 1. F______ ,thank you. And you?

Mike: I'm fine, too. Is this your 2.p______?

Tom:3.Y______,it's my pencil.

Mike: What's this in 4.E______?

Tom:It's a book.

Mike: And what's this7

Tom: It's a 5.d______.

Mike: How do you 6.s______it?

Tom: D-I-C-T-I-O--N-A-R-Y.

直径或边宽为500mm的桩，可对称安置（）个位移测试仪表

A、1

B、2

C、3

D、4