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【单选题】

下列昆虫可以用胃毒剂性杀虫剂来防治的有

A.
棉蚜
B.
蝗虫
C.
D.
红蜡蚧
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参考答案:
参考解析:
.
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举一反三

【单选题】Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food.Fergus Clydesdale, head of the department of food science and nutrition at the University of Massac...

A.
They overlook the risks of the food they eat.
B.
They overestimate the hazards of their food.
C.
They are overoptimistic about the safety of their food.
D.
They overstate the government's interference with the food industry.

【单选题】​下列哪个不能防治酸雨:

A.
开发新能源
B.
进行污水处理
C.
少开车,多乘坐公共交通工具
D.
使用燃煤脱硫技术

【单选题】防治“煤壁线”附近局部冒顶的措施不对的是( )。

A.
及时支护顶板
B.
严禁空顶作业
C.
严格执行敲帮问顶
D.
加大工作面端面距