试题与答案

互利共生是() A.一方受益,另一方受害 B.一方受益,另一方无益也无害 C.双方均

题型:单项选择题 B型题

题目:

互利共生是()

A.一方受益,另一方受害

B.一方受益,另一方无益也无害

C.双方均受益

D.双方均不受益

E.双方无益也无害

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:发包人收到承包人送交的竣工验收报告后28d内不组织验收,或者在组织验收后14d内不提出修改意见,则视为竣工验收报告已经被认可。

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材料一:福寿螺是国际上很受欢迎的美味菜肴。上世纪80年代四川某公司从国外引入福寿螺,在水田中进行人工养殖。由于出口受阻,四年后放弃养殖,该公司清理大福寿螺后,将水田还给农民种水稻。农民种下稻秧后,又有大批福寿螺出现,并通过各种渠道蔓延扩散,它们啮食水稻等水生植物,造成粮食大幅减产。

材料二:水葫芦20世纪初作为一种花卉引入我国,50~60年代作为猪饲料推广种植,后逸为野生。由于水葫芦疯长,滇池草海60年代还有16种高等植物,到90年代只剩下3种。

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