砌筑工程质量保证措施应包括（）
A.组砌得当
B.砂浆饱满
C.接槎可靠
D.上下错缝
E.灰缝厚度尽量小
参考答案：A, B, C, D
We ________ such great achievements without your efforts. Thanks a lot.
A．can’t have made
B．couldn’t have made
C．were unable to make
D．are unable to make
焦化装置调节循环比的手段有调节蜡油回流量、调节急冷油流量。
