皮皮学，免费搜题
登录
搜题
【单选题】
某山区发生了较大面积的森林病虫害。在讨论农药的使用时，老许提出：“要么使用甲胺磷等化学农药，要么使用生物农药。前者过去过，价钱便宜，杀虫效果好，但毒性大；后者未曾使用过，效果不确定，价格贵。” 从老许的提议中，不可能推出的结论是（ ）。A.
如果使用化学农药，那么就不使用生物农药
B.
或者使用化学农药，或者使用生物农药，两者必居其一
C.
如果不使用化学农药，那么就使用生物农药
D.
化学农药比生物农药好。应该优先考虑使用
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】has, he ,since, away, been , ago, years , China , from _______________________________________________________________. 小题1: should , to ,green, what, we, do, live, a ,life ___________________________...
【单选题】He slipped and broke his leg. _________, he will have to be away from school for two or three months.
A.
On the contrary
B.
In a word
C.
In a way
D.
As a result
【简答题】配电箱APZ1、APZ2的电源来自于何处?( )
【单选题】He has made a promise that _____ the cost, he will buy the house not far away from the beach. [ ]
A.
no matter how much
B.
whatever
C.
however
D.
no matter how
【简答题】确定流水节拍的主要因数是什么?
【单选题】He decided to_______ his family and now he lives in Australia. [ ]
A.
break away from
B.
take away from
C.
keep away from
D.
go away from
【简答题】A. He'll give the man a few prescriptions right away. B. He'll be away from the office for one or two days. C. The woman doesn't need anything for her cough. D. The woman should continue taking the me...
【单选题】Was it in this very room ____ he made up his mind ____ he should break away from his family?
A.
that; which
B.
which; that
C.
which; which
D.
that; that
【多选题】流水节拍是流水施工的主要参数之一，同一施工过程中流水节拍的决定因素有（ ）。
A.
所采用的施工方法
B.
所采用的施工机械类型
C.
投入施工的工人数和工作班次
D.
施工过程的复杂程度
E.
工作的熟练程度
相关题目：