A:wouldn’t
B:needn’t
C:mustn’t
D:oughtn’t
One ____(美元) is about seven yuan.
①油脂类
②果蔬类
③谷类
④鱼、肉、蛋类
⑤乳、豆类
如图:Rt△ABC≌Rt△DEF,则∠D的度数为( )