--- ____________ my glasses? I can’t read without them.

--- I ____________ them on the desk, but they are not there now.

A．Have you seen; have seen

B．Have you seen; saw

C．Did you see; have seen

D．Did you see; saw

建筑装饰装修工程质量验收规范（GB50210-2001）：玻璃与构件不得直接接触，玻璃四周与构件凹槽底部应保持一定的空隙，每块玻璃下部应至少放置两块宽度与槽口宽度相同、长度不小于（）的弹性定位垫块玻璃两边嵌入量及空隙应符合设计要求

A.110mm

B.90mm

C.100mm

D.120mm