城市语音DT测试掉话率优秀值（），基准值（）
A.0.5%，1%
B.0.01%，0.05%
C.0.1%，0.5%
D.0.05%，0.1%
参考答案：A
49 （单项选择题）
A.Thompson was shocked and devastated.
B.Another trial was held.
C.I cannot begin to imagine what would have happened had my mistaken identification occurred in a capital case.
D.During the attack, she made an effort to memorize every detail of his face , looking for scars , tattoos (纹身) or other identifying marks.Jennifer
E.Many criminals are sent to prison on the basis of accurate testimony by eyewitnesses.
F.Jennifer Thompson decided to meet Cotton and apologize to him personally.
细胞分裂后，新细胞与原细胞的染色体的比率是[ ]
A．1：3
B．1：2
C．1：l
D．2：1
