价值工程进行功能确定时,需要考虑( )因素。
A.用户需求
B.条件环境
C.承受能力
D.成本
E.利润
参考答案:A,B,C
根据碘与氢气反应的热化学方程式,下列判断正确的是( )
①I2(g)+H2(g)⇌2HI(g)+9.48kJ
②I2(S)+H2(g)⇌2HI(g)-26.48kJ.
A.254g I2(g)中通入2g H2(g),反应放热9.48 kJ
B.当反应②吸收52.96kJ热量时转移2mole-
C.反应②的反应物总能量比反应①的反应物总能量低
D.1 mol固态碘比1 mol气态碘所含能量多了17.00 kJ
The country has()too many wars in the past few decades; its people are longing for peace so much.
A.prevented from
B.resulted in
C.gone through
D.gone with