下列哪项不是开的原因（）
A.吐舌习惯
B.磨牙萌出过度
C.佝偻病
D.咬物习惯
E.下颌逆时针旋转生长
参考答案：E
I support your decision, but I should also make itclear that I am not going to be __ to do it. [ ]
A. connected
B. fastened
C. bound
D. stuck
拌制混凝土和砂浆用粉煤灰烧矢量试验中，III级F类粉煤灰应不大于（）。
A.5.0%
B.8.0%
C.10.0%
D.15.0%
