11.普通硅酸鹽水泥的代號為(      )

A.P.S                                                             B.P.F

C.P.O                                                            D.P.P

12.下列屬于按組成材料分類的抹灰砂漿是(      )

A.水泥砂漿                                                   B.砌筑砂漿

C.裝飾砂漿                                                   D.防水砂漿

13.混凝土和易性中的粘聚性指的是拌合物(      )

A.組成材料之間的粘聚性能                           B.填充模板的性能

C.保持水分的性能                                         D.產(chǎn)生流動的性能

14.普通鋼、優(yōu)質(zhì)鋼、高級優(yōu)質(zhì)鋼劃分的依據(jù)是鋼材的(      )

A.用途                                                          B.質(zhì)量

C.脫氧程度                                                   D.冶煉方法

15.木材的纖維飽和點是木材細胞壁內(nèi)充滿水時的含水率，這種水是(      )

A.自由水                                                       B.吸附水

C.游離水                                                       D.結(jié)合水