对此患者治疗的原则是
A．促进下颌发育B．促进上颁发育C．抑制下颁发育D．抑制上颌发育E．抑制上颁发育，促进下颁发育
参考答案：E
-Would you like to my cat for ten days while I'm in China?
-I'd like to, but I have to a meeting in one week. [ ]
A. attend to; attend
B. attend; join
C. attending; take part in
D. attend to; join in
我国古代的四大发明是：
A． 造纸、 火药、指南针
B． 甲骨文、造纸、印刷、火药:
C．造纸、印刷、指南针、丝绸
D．造纸、印刷、指南针、火药
