问题
问答题 简答题
频振式杀虫灯的杀虫原理是什么?
答案
参考答案:
频振式杀虫灯是利用害虫的趋光性(由灯管产生)、趋波(由电网产生)、趋色(由紫外线灯管和壳体产生)、趋味(由集虫袋内的虫体产生)的特性,近距离用光,远距离用波,加以色和味引诱害虫成虫扑灯,通过频振式高压电网将害虫击晕或击死,最后落入集虫袋内,同时被击袭的虫体也可发出性激素,诱来更多的害虫。
频振式杀虫灯的杀虫原理是什么?
参考答案:
频振式杀虫灯是利用害虫的趋光性(由灯管产生)、趋波(由电网产生)、趋色(由紫外线灯管和壳体产生)、趋味(由集虫袋内的虫体产生)的特性,近距离用光,远距离用波,加以色和味引诱害虫成虫扑灯,通过频振式高压电网将害虫击晕或击死,最后落入集虫袋内,同时被击袭的虫体也可发出性激素,诱来更多的害虫。
In the following passage, there are 20 blanks representing words that are missing from the context. Below the passage, each blank has 4 choices marked by letter A, B, C and D respectively. There is only ONE right answer. Blacken the corresponding letter as required on your Machine-scoring ANSWER SHEET.
How many of us would temp for three years while we waited for the perfect job Not many of us, perhaps. But Wentworth Miller, the "Prison Break" star, said he chose to wait even longer time (91) he found the right job. "Actually I think it might have been three or four years until I was lucky enough to get guest (92) on TV shows," said Miller, 34, who rose to international stardom (93) to "Prison Break" in 2006. That kind of patience and p will was portrayed in "Prison Break". Miller (94) engineering wizard Michael Scofield, who tries everything to break out of a Chicago (95) with his brother. Miller said he was fond of his character, (97) he said "exists in shades of grey". Miller comes from a (97) of teachers. He said he didn’t seem fated for a career in the arts, (98) his passion for acting. After (99) from Princeton with an English degree, he moved (100) his parents’ request to Los Angeles to look for a stable life. He started (101) in a little company that made television movies. This (102) simply faxing, filing, walking the boss’ dog and going to the store for the boss’ lunch. Every weekend during the summer, Miller (103) go to the office (104) he didn’t have air-conditioning. "I would hang (105) in the conference room and set up camp and rob the company kitchen," recalled Miller. (106) , Miller realized he still had questions about his choice. He decided to quit. But the boss said he was making a mistake and offered him a well-paid assistant position. "I eventually (107) that if I did the corporate job, it would be great if I was successful, but I would always wonder about the (108) . If I did the acting and was successful, I would never wonder (109) that job," he explained. He quit and temped (110) many people in the entertainment industry. |
A.acting
B.work
C.study
D.research