混凝土施工缝宜留在结构受（）较小且便于施工的部位。
A.压力
B.弯矩
C.剪力
D.荷载
参考答案：C
常用于检识生物碱的试剂是（）
A.碘化铋钾
B.盐酸镁粉
C.醋酸镁
D.三氯化铝
E.茚三酮
The middleaged woman ________ the difficulties to bring up her three children. [ ]
A. settled
B. found
C. overcame
D. sought
