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当前学科：作物栽培学
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实施绿肥制、生草制或绿肥与（）是未来园艺业乃至整个农业解决肥源问题的根本途径。
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以下哪项属于常用的开放式问题（）。
Dream for Better We all have plans and dreams for a better, more ___1___ life. Yet only a small percentage of people actually achieve their ___2___ .A good question is: why? Recently, I was working with a young man who was ___3___ get on his feet. He had written out his goals, and he had powerful reasons why he wanted to achieve these goals. But after weeks of trying, he was still not much further along. So we took some time to try to understand what was holding him ___4___ .As we examined his average day, it became apparent to me that he was much too ___5__ .He was spending lots of time doing lots of different things. I ___6___ that most of what he was doing was not very important in the greater scheme of things. We did some exercises to ___7___ which activities were important, which ones were urgent and which ones was filling (or killing) time. As it turned out, most of the things he was doing throughout the day were filling time. He wasn't comfortable ___8___ he was very busy, so he created things that needed to be done. He was always working on something—yet at the end of the day, he had rarely accomplished any tasks to move him closer to the life he wanted. This behavior is fairly easy for an outside observer to spot but extremely difficult to self-diagnose. The ___9___ is to slow down and get comfortable with being still, with contemplating what we really want and whether our actions are suitable for our goals. Many of our activities are avoidance activities: we do things to fill up the time and thus avoid having to do more difficult tasks. It wasn't easy, but once the young man finally accepted that he needed to do less overall but more of the important things, his life took a dramatic ___10___ for the better. ___9___内的正确选项为（）
开创国有企业设立公关部先例的是（）。
试述胃大部切除术治疗溃疡病的原理。
青霉素酶作用于青霉素的位点是（）
使用机铰刀开始铰削时，先用手动进给，待铰进深度达（）后，再改用机动进给。
下列哪一种不属于消化性溃疡的并发症（）
下列情况可使用招引他船注意的信号的是：（）.Ⅰ、本船走锚Ⅱ、本船有人落水Ⅲ、本船发现不名漂浮物
如果一个项目的内部报酬率(IRR)为10%，这说明()。