【单选题】混凝土浇筑完毕后,应按施工技术方案及时采取有效的养护措施,并符合相关规定,下列选项中,说法正确的是( )。
A.
应在浇筑完毕后的24 h以内对混凝土加以覆盖并保湿养护
B.
混凝土浇水养护的时间:对采用硅酸盐水泥、普通硅酸盐水泥或矿渣硅酸盐水泥拌制的混凝土,不得少于7 d;对掺用缓凝型外加剂或有抗渗要求的混凝土,不得少于14 d
C.
浇水次数应能保持混凝土处于湿润状态;混凝土养护用水应与拌制用水相同
D.
采用塑料布覆盖养护的混凝土,其敞露的全部表面应覆盖严密,并应保持塑料布内有凝结水
E.
混凝土强度达到1.5 N/mm 2 前,不得在其上踩踏或安装模板及支架度
【单选题】下列有关模板的技术要求中,说法不正确的是
A.
对跨度不小于4米的现浇钢筋混凝土梁、板,其模板应按设计要求起拱
C.
模板的接缝不应漏浆,在浇筑混凝土前,木模板内允许有少量积水
【单选题】一患者有多饮,多尿,多食及体重减轻。OGTT结果如下;空腹为6.0mmol/L,餐后一小时为11.0mmol/L,餐后两小时11.8mmol/L此患者的诊断是( )
【多选题】下列有关模板的技术要求中说法正确的是( )
A.
对跨度不小于4米的现浇钢筋混凝土梁板,其模板应按设计要求起拱
C.
模板的接缝不应漏浆,在浇筑混凝土前,木模板内允许有少量的积水
【多选题】混凝土浇筑完毕后,应按施工技术方案及时采取有效的养护措施,并符合相关规定,下列选项中,说法正确的是()
A.
应在浇筑完毕后的24h以内对混凝土加以覆盖并保湿养护
B.
混凝土浇水养护的时间:对采用硅酸盐水泥、普通硅酸盐水泥或矿渣硅酸盐水泥拌制的混凝土,不得少于7d;对掺用缓凝型外加剂或有抗渗要求的混凝土,不得少于14d
C.
浇水次数应能保持混凝土处于湿润状态;混凝土养护用水应与拌制用水相同
D.
采用塑料布覆盖养护的混凝土,其敞露的全部表面应覆盖严密,并应保持塑料布内有凝结水
E.
混凝土强度达到1.5N/mm2前,不得在其上踩踏或安装模板及支架
【单选题】That ( ) is NOT the reason why sustainable management of tropical forests is unlikely to become widespread in the near future.
A.
the countries where tropical forests are located need revenue from logging desperately
B.
corruption occurs so commonly in the governments of developing countries that the money won't reach the people it is intended for
C.
wood prices from sustainably managed forests would increase at such a rate that consumers are unlikely to pay
D.
the value of most commercial tree species in tropical forests rises much more slowly compared with the returns from interest
【单选题】一患者有多饮多尿多食及体重减轻。OGTT结果如下:空腹为6mmol/L,餐后1小时为11mmol/L,餐后2小时为11.8mmol/L。此患者的诊断是
【多选题】Why A Dream of Red Mansions is a monumental work in the Chinese literature?
A.
It reveals the darkness and corruption that permeates the last stage of the feudal society.
B.
Its theme is made conspicuous in the great complexity of its plots
C.
Its language of the book is succinct and sincere, vivid and visual.
D.
It suits both refined and popular tastes as a coherent and organic whole.
【单选题】Why does political instability and insecurity of property rights retard economic growth?
A.
Fear that private property will be confiscated substantially reduces the incentive of individuals to invest and create wealth.
B.
When property rights are insecure, foreign investors are more willing to invest in the country.
C.
Savings flow into a country if individuals fear their property is insecure.
D.
Political instability and corruption can enhance the coordinating power of the
【多选题】9 下列有关模板的技术要求中说法正确的是( )
A.
对跨度不小于4米的现浇钢筋混凝土梁.板,其模板应按设计要求起拱
C.
模板的接缝不应漏浆,在浇筑混凝土前,木模板内允许有少量的积水