属于缓冲区
A．上颌牙槽嵴B．磨牙后垫C．切牙乳突D．颊侧前庭E．粘液腺导管开口
参考答案：C
Can you find ________ head?[ ]
A. he
B. he's
C. his
D. him
运输动植物、动植物产品和其他检疫物过境的应当在进境时报检。( )
