属于副承托区
A．牙槽嵴B．磨牙后垫C．切牙乳突D．颊侧前庭E．黏膜腺导管开口
参考答案：D
You have to explain ____ us the reason _____ your being absent from school yesterday.
A．to; of
B．to; why
C．for; that
D．to; for
(1)法院判决 (2)签订合同 (3)支付违约金 (4)提起诉讼 (5)单方违约( )
A．4―2―1―5―3
B．2―4―1―3―5
C．2―4―5―1―3
D．2―5―4―1―3
