简述害虫发生期预测的常用方法?

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问题:

简述害虫发生期预测的常用方法?

考点:农学园林植物病虫害防治园林植物病虫害防治题库
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起于约公元前2070年,止于公元前771年,历时约1300多年,在中国历史舞台上依次出现的“上古三代”是

①夏②商③周④秦[ ]

A.①②④

B.②③④

C.①②③

D.①③④

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患者经期 * * 胀痛,痛甚不可触衣,胸闷痰多,食少纳呆,平素带下量多,色白稠黏,月经量少,色淡,舌淡胖,苔白腻,脉缓滑。其证候是()

A.肝气郁结证

B.气滞血瘀证

C.肝肾亏虚证

D.胃虚痰滞证

E.肝胃不和证

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现在儿童所使用的“早教机”主要运用了下列哪种原理吸引幼儿的学习兴趣()

A.计算机辅助教学

B.代币强化

C.程序教学

D.自定步调

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The United States counts its population every ten years, and each census reveals that the racial and ethnic mix is changing dramatically, so by the year 2050, the "average" American will not be descended from (1) , but the majority of U. S. residents will trace (2) ancestry to Africa, Asia, the Hispanic world, the Pacific Islands, or the Middle East. Once the United States was a microcosm of European nationalities, (3) the United States is a microcosm of the world. The United States is (4) considered a "melting pot" society by many of its residents. (5) , many people prefer the term "salad bowl." They use this (6) to describe American society. American society will soon be (7) nonwhite. "Melting pot" implies that the different ethnic groups blend together (8) one homogeneous (9) , "salad bowl" (10) that nationalities, like the ingredients in a mixed green salad, retain their cultural (11) . Earlier generations of (12) believed they had to learn English quickly not only to survive but also for (13) .
Now, many immigrant groups do not (14) the same need. Because there are many places in America (15) you can work, shop, get medical care, marry, divorce and die without knowing English. (16) , Chinatown in San Francisco and New York. Also, Los Angeles has many Vietnamese immigrants and immigrants from Mexico. (17) , many immigrant groups want their children to know their (18) culture. Many Hispanics, for instance, want their children to learn (19) English and Spanish and study the Spanish language in school. They are fighting for the (20) to bilingual education in many communities. In many communities they are in the majority.

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鼻咽癌早期表现不包括()

A.咽隐窝处小肿块

B.横轴位显示优于矢状位

C.T1加权像优于T2加权像

D.肿瘤明显增强

E.可向深部浸润

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