国防科技工业计量检定人员有以下哪些行为，所在单位可根据情节轻重给予处理（）。

单项选择题对商品混凝土早期强度提高作用最大的外加剂为（）。

A.M剂
B.硫酸钠
C.NaNO₃
D.引气剂

单项选择题钻铤的主要特点是（）。

A.壁厚大、重量大
B.壁厚大、刚度大
C.壁厚大、重量大、刚度大

单项选择题Which of the following could be an appropriate title for this passage?（）

A.Louis XIV and the Palace of Versailles.
B.The ceilings of the Hall of Mirrors.
C.The Amazing Palace of Versailles.
D.A History of France.

单项选择题Which of the following is not mentioned as a feature of the Hall of Mirrors？（）

A.Bronze moldings.
B.Ornate paintings.
C.Marble fixtures.
D.Crystal chandeliers.

单项选择题about this articles which of the following is NOT true？（）

A.The Hall of Mirrors has been recently restored.
B.The Hall of Mirrors is considered the centerpiece of the Palace of Versailles.
C.The Hall of Mirrors features a parquet floor.
D.Two major treaties were signed in the Hall of Mirrors.