【单选题】现浇混凝土其他构件模板工程量计算时,下列规则错误的是( )。
A.
雨蓬按图示外挑部分的水平投影面积计算,板周边的侧模并入相应板定额计算。
B.
天沟、挑檐按按混凝土与模板的接触面以面积计算
C.
栏板按混凝土与模板的接触面以面积计算,其压顶模板并入计算
D.
台阶不包括梯带,按图示尺寸的水平投影面积计算,台阶端头两侧模板不另计算,台阶两侧的挡墙另行计算
【简答题】脂肪酸的β-氧化与生物合成的主要区别是什么?
【单选题】We call a ship equipped with a diesel engine as main engine____.
【单选题】半径为 的飞轮,初角速度 ,角加速度 ,则在t=( )时角速度为零。
【单选题】The thickness of the oil film to be developed in a diesel engine main bearing, depends upon the_____.
【简答题】液相色谱-质谱联用大都采用大气压电离源作为接口装置和离子源。包括____电离源和____电离源,其中以____电离源应用最为广泛。
【单选题】In the compression stroke, one main difference between a diesel engine and a petrol engine is that ______. A the air is compressed in the sealed cylinder in the diesel engine
B.
the petrol engine has a comparatively very low compression ratio
C.
combustion occurs by spark ignition in the diesel engine