题目内容
（请给出正确答案）
[主观题]
The control of artificial devices is improving because ______.A．video signals can be trans
The control of artificial devices is improving because ______.
A．video signals can be transformed into light patterns
B．bionic machines have existed for centuries
C．artificial devices such as arms, legs and eyes require better control than bionic machines
D．science has made great advances in electronics
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