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wavelength—改成wavelengths
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Scientists∧warned—加入have
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A．provide a British-led force with information and materials.B．help a British-led armed force in military training.C．help to train new soldiers only in a. British-led force.D．provide the new Afghan army with military information.
A．provide a British-led force with information and materials.
B．help a British-led armed force in military training.
C．help to train new soldiers only in a. British-led force.
D．provide the new Afghan army with military information.
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