____ I had time, I would have played it_爱下问搜题

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问题选择题

____ I had time, I would have played it again.

A．If

B．Unless

C．Had

D．When

答案

答案：C

单项选择题 A1/A2型题

下列哪种水门汀能与牙齿形成化学性结合（）

A.磷酸锌水门汀

B.玻璃离子水门汀

C.氢氧化钙水门汀

D.氧化锌丁香酚水门汀

单项选择题

机械化驼峰适用于调车线不少于（）股道的大、中型编组站。

A.8

B.16

C.24

D.36