题目内容
（请给出正确答案）
提问人：网友13***556
发布时间：2022年3月26日 17:09
[单项选择题]
A new high-performance contact lens under development at the department for applied physics at th...Which of the following is true about Bille’s lenses（）
A．They will be sold at a very low price.
B．Their production process is complicated.
C．Purchase orders can be made through the Internet.
D．They have to be replaced every day.
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