| Even the newest gardener realizes that
plants die without water; what is not so well known is that plants die equally
decisively, though not so quickly, if they are overwate red. Beginners usually
decide to play it safe and keep their potted plants thoroughly wet. In
consequence, death by drowning is one of the commonest disasters to befall the
plants of a new horticulturist. Plants wither away if they don’t get enough
water, and this draws attention to their problem. A plant that has been slightly
underwatered so that it droops strikes terror into the heart of its new owner.
But it will, in fact, recover completely as long as rescue comes in time and the
process is not repeated too often. Overwatered plants, unfortunately, do not
give any such obvious signal; slowly they cease to thrive and the first visible
indication of serious tro A. To warn gardeners not to underwater plants B. To give information about general problems of gardening C. To draw attention to the problem of overwatered plants D. To recommend new gardeners the book about gardening [单项选择]在腰腿痛患者中，出现哪项症状时，应考虑腰椎管狭窄症（）
A. 腰腿痛症状发作剧烈 B. 出现大小便异常 C. 马鞍区感觉异常 D. 踝反射消失、踝阵挛出现 E. 行走一段路程后，出现腰腿痛，需休息片刻后，方可继续行走 [判断题]数量增加对生产进度的影响较大，因此必须拒绝客户临时增加数量的要求。( )
[单选题] 天然气比较常见的分类方法中有按()特点分类。
A.储存 B.矿藏 C.气体 D.含碳 [单选题]SCADA系统，即( )
A.安全分析系统 B.事故分析系统 C.调度员仿真培训系统 D.监视控制和数据采集系统 [单选题]无缝线路区段作业，气温较高的季节，安排（ ）地段进行综合维修。
A.锁定轨温较高 B.设计锁定轨温较低 C.锁定轨温较低 D.设计锁定轨温较高 [判断题]>电位、电压、电压降、电动势，它们的单位是伏（V）。（）
A.正确 B.错误 [多项选择]骨髓瘤好发于下列哪些部位
A. 肱骨 B. 脊椎 C. 肋骨 D. 骨盆 E. 胸骨 [单选题]某公司经营风险较大，准备采取系列措施降低杠杆程度，下列措施中，无法达到这一目的的是（ ）。 (1分）
A.A. 降低利息费用 B.B. 降低固定成本水平 C.C. 降低变动成本 D.D. 提高产品销售单价 我来回答: 提交
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