较厚材料的矫正方法一般采用机械矫正和（）。
A、手工矫正
B、反向弯曲
C、火焰矫正
D、水火矫正
参考答案：C
法洛四联症可能出现下列哪种表现（）
A.脑脓肿
B.栓塞
C.一过性意识丧失抽搐
D.蹲踞现象
E.以上都是
An ideal society is a society that has ______ a respect for the dignity and worth of the individual.
A. at its best B. at its hand C. at its core D. at its end
