题目：
随着液压技术的普及和应用领域的日益扩大，对液压缸的方向发展是（）。
A、高压化、小型化
B、高性能、多品种、结构复合化
C、节能与耐腐蚀
D、以上全是
答案：
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参考答案：自尊心
随着液压技术的普及和应用领域的日益扩大，对液压缸的方向发展是（）。A、高压化、小型化
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