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【判断题】
冰雹的危害主要是由于它降落时的机械破坏作用, 砸坏 农作物的叶片、茎秆、 穗(荚、果)，造成叶片破碎、 茎秆折断、植株倒伏、花果脱落，其危害对农作物产量影响不大。
A.
正确
B.
错误
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】图5-6为影响农作物生产因素示意图，正确的是( ) 图5-6
A.
①花生②水稻③蔬菜④冬小麦
B.
①甘蔗②棉花③花卉④甜菜
C.
①油菜②花卉③水果④棉花
D.
①棉花②桑树③亚麻④冬小麦
【单选题】For the (26) month, mysterious falls of large chunks of ice (冰雹) (27) rained down on Spain and Italy. Juana Sanchez, a 70-year-old woman in Almeria, southern Spain, was knocked (28) when she was struc...
A.
Although eyewitnesses to the phenomenon report that they did not see anything in the sky that could account (44) the ice, scientists had to come up with a rationalization. Professor Jesus Martinez Frias, the geologist investigating the ice falls in Spain, told BBC News that the ice pieces had probably been (45) through sudden temperature drops in the stratosphere. This was the most likely explanation, he said, for the "very unusual" phenomenon.
【单选题】通过哪种方式可以减少金属镉向农作物的转移
A.
加入石灰使pH增加，使其转化成难溶盐
B.
加入Ca(OCl)Cl使pH增加，转化成难溶盐
C.
加入硅酸使pH降低，转化成难溶盐
D.
加入CaCl 2 使pH降低，转化成难溶盐
E.
加入NaCl与镉元素结合
相关题目：
【单选题】图5-6为影响农作物生产因素示意图，正确的是( ) 图5-6
A.
①花生②水稻③蔬菜④冬小麦
B.
①甘蔗②棉花③花卉④甜菜
C.
①油菜②花卉③水果④棉花
D.
①棉花②桑树③亚麻④冬小麦
【单选题】For the (26) month, mysterious falls of large chunks of ice (冰雹) (27) rained down on Spain and Italy. Juana Sanchez, a 70-year-old woman in Almeria, southern Spain, was knocked (28) when she was struc...
A.
Although eyewitnesses to the phenomenon report that they did not see anything in the sky that could account (44) the ice, scientists had to come up with a rationalization. Professor Jesus Martinez Frias, the geologist investigating the ice falls in Spain, told BBC News that the ice pieces had probably been (45) through sudden temperature drops in the stratosphere. This was the most likely explanation, he said, for the "very unusual" phenomenon.
【单选题】中细碎圆锥破碎的产物直接从破碎机的（）排出。
A.
中部
B.
侧部
C.
底部
【单选题】破碎的难易的决定因素是物料的（）。
A.
强度
B.
硬度
C.
密度
【单选题】遇有（）及以上风或暴雨、雷电、冰雹、大雪、大雾、沙尘暴等恶劣气候时，应停止露天高处作业。
A.
五级
B.
六级
C.
七级
D.
八级
【单选题】黔西南最突出的农作物是下列（）。
A.
甘薯
B.
油菜
C.
核桃
D.
柑橘
【判断题】破碎筛分的目的是使矿物单体解离。
A.
正确
B.
错误
【单选题】禁止开垦种植农作物的陡坡地度数是（）
A.
十五度
B.
二十度
C.
二十五度
D.
三十度
【单选题】下列选项中，不属于农作物种植阶段应核算的内容是()。
A.
机械作业
B.
消耗原材料
C.
播种人员用工
D.
种苗的购买价款
【单选题】下列哪种农作物不是原产于美洲？（）
A.
红薯
B.
辣椒
C.
橡胶
D.
咖啡
【单选题】通过哪种方式可以减少金属镉向农作物的转移
A.
加入石灰使pH增加，使其转化成难溶盐
B.
加入Ca(OCl)Cl使pH增加，转化成难溶盐
C.
加入硅酸使pH降低，转化成难溶盐
D.
加入CaCl 2 使pH降低，转化成难溶盐
E.
加入NaCl与镉元素结合