在我国远古居民中，使用新石器的是（）
A.北京人
B.元谋人
C.蓝田人
D.河姆渡氏族
参考答案：A
The workers were making so much noise in the workshop, and the boss hurriedly
Went to see____.
A．what thematter was
B．what was the wrong
C．what wrong was
D．what was the matter
骨膜、骨质和（）构成活体内每个骨块。
A、骨髓腔
B、骨髓
C、松质骨
D、密质骨
