音色分为人声音色和（）音色
A.童声
B.女声
C.男声
D.乐器
参考答案：D
John received an invitation to dinner, and with his work ________, he gladly accepted it．
A．finished
B．finishing
C．having finished
D．was finished
继发于外伤的是
A．鞘膜积液B．精索静脉曲张C．鞘膜积血D．隐睾E．附睾炎
