由于焊缝横截面形状不对称或焊接顺序不合理,致使焊缝在厚度方向上横向收缩不一致所产生的变形称为______。
A.弯曲变形
B.角变形
C.波浪变形
D.扭曲变形
参考答案:B
多囊卵巢综合征时过多的雄激素主要是()、()。
It is said that the Olympic Games ______ in London in 2012 will cover more events than any other Olympics did.
A.to be held
B.held
C.to be holding
D.will have been held