以下脑颅骨中成对的为
A.额骨
B.顶骨
C.筛骨
D.蝶骨
E.枕骨
参考答案:B
解析:所列选项中,顶骨是成对的颅骨。
He___ have attended the meeting this morning. He has been staying at my home for a whole day.
A.can’t
B.mustn’t
C.shouldn’t
D.needn’t
作为出席仪式的代表,均应身着()、面带微笑、举止热情。