题目内容
钾肥的移动性较差，磷肥的移动性更差，宜深施至根系分布最多处。
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基肥因肥效较慢应深施，追肥肥效较快，则宜浅施。
叶面肥在喷施时一定要喷匀，这样有利于吸收。叶面肥要严格掌握喷施浓度，以免烧伤叶片。阴天或上午10时以前和下午4时以后喷施较好。
施肥需要注意不靠近树基；不要太浅不要太深，不超过60cm。
It has been replaced by dead-bolt locks, security chains, ______ (1) alarm systems and trip wires ____ ___ __ (2) a police station or private guard firm. Many _____ (3) families have sliding glass doors on their patios, with steel bars elegantly ____ __(4) So no one can pry the doors open.It is not ______ (5), in the most pleasant of homes, to see pasted on the windows small notices ___________ (6) that the premises are under __________ (7) by this security force or that guard company.The lock is the new _______ (8) of America. Indeed, a recent public-service advertisement by a large insurance company ______ (9) not charts showing how much at risk we are, but a picture of a child's bicycle with the now-usual padlock _______ __ (10) it.
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