【单选题】6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。前者过去曾用过,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?
B.
或者使用化学农药,或者使用生物农药,两者必居其一
【单选题】道德常常能弥补()的缺陷,然而智慧却永远填补不了道德的空白。
【单选题】课间休息时,王同学趁李同学不注意撤掉椅子,李同学一下坐空了,摔在地上,摔伤了脚。李同学应该
【单选题】According to the news, most poor people cannot do all of the following EXCEPT ______.
B.
feeding their families.
C.
buying enough necessities.
【单选题】Which of the following is not true according to the text?
A.
Network entertainment is a huge and growing industry.
B.
It may not be possible for you to select any movie or television program ever made.
C.
The killer application is video on demand,
D.
You may play a role in new films in the future.
【判断题】土的原位测试是指在工程地质勘察现场,在可以扰动土层的情况下对土层进行测试
【单选题】下列除哪项外,均属妊娠恶阻的常见证候()