不出的天体其赤纬Dec应满足()。
A.Dec>90°-φ且同名
B.Dec<90°-φ且异名
C.Dec≥90°-φ且异名
D.Dec<90°-φ且同名
参考答案:C
A business firm reduces the number of hours its employees work from 40 hours per week to 36 hours per week while continuing to pay the same amount of money. If an employee earned x dollars per hour before the reduction in hours, how much does he earn per hour under the new system ?()
A.A
B.B
C.C
D.D
E.E
患者上前牙外伤就诊。查:右上1牙冠松动Ⅲ度,牙龈出血,叩(++),X线片示:根折位于颈1/3处,剩余根长约15mm。该牙处理为()
A.拔除牙冠部分,直接修复
B.固定
C.拔除患牙
D.拔除牙冠部分,根部行根管治疗
E.直接光敏粘着修复