医学节肢动物对人体的间接危害是
A. 传播病原体
B. 吸血
C. 毒害
D. 骚扰
E. 寄生
不传播疾病,仅寄生人体致病的医学节肢动物是:
A. 硬蜱
B. 软蜱
C. 虱
D. 蚤
E. 疥螨
节肢动物的生物性防治是指:
A. 利用杀虫剂消灭节肢动物
B. 利用声、光、电等诱杀节肢动物
C. 利用天敌捕食节肢动物
D. 利用遗传方法防制节肢动物
E. 通过环境改造防制节肢动物
Part Three (para 13-21)Einstein’s discoveries were attributable to _________________.
A. His imagination and questioning.
B. His disregard for authority.
C. His powers of concentration.
D. His interest in science.