The title with the √ before it is considered to be the better one. Decide whether the following choice is the correct one. √ A.

The title with the √ before it is considered to be the better one. Decide whether the following choice is the correct one. √ A. The Highly efficient waveguide grating couplers using silicon-on-insulatorB. Silicon-on-insulator for high-output waveguide grating couplers

A.正确

B.错误

正确答案:错误

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