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【单选题】
德国Dammer推出一种能识别（ ）的喷雾器。它在田野移动时，能借助专门的电子传感器来区分庄稼和杂草，当发现只有这种草时，才喷出除莠剂。
A.
狗牙根
B.
雀麦
C.
莠草
D.
蒲公英
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Genetic engineering holds great potential payoffs for farmers and consumers by making crops resistant to pests, diseases, and even chemicals used to kill surrounding weeds. But new research raises con...
A.
make crops hardier
B.
kill weeds through cross-breeding
C.
make crops resistant to chemical fertilizers
D.
improve the yield and quality of most crops