【简答题】(江苏省连云港)阅读下面文字,完成17-20题。(12分) 如果你能在夜间观赏到海发光,那是相当瑰丽的。它似星光万点,又似乳光一片,更似绚丽多彩的礼花。人们称这种现象为“海火”,这种迷人的景象是谁引起的呢?是谁的杰作呢? 有一种海发光出现在航行中的船舶四周及船尾的浪花泡沫里,这主要是由颗粒很小的发光浮游生物引起的。其本身多呈玫瑰红色,平时凭借其体内的一种脂肪物质就能微放光明。发光的特点是,由无数白...
【判断题】喷油量控制是电控燃油喷射系统主要控制功能 之一 。( )
【简答题】(7分)如图为实验室中常见的气体制备、干燥、收集和性质实验的部分仪器。试根据题目要求,回答下列问题: (1)某同学以锌粒和稀盐酸为原料在实验室制备、收集纯净干燥的氢气,选择仪器连接装置后,检查装置的气密性。 ①所选装置的连接顺序为 。 ②若要验证氢气的可燃性,在点燃氢气之前一定要 。 ③写出该同学制备氢气发生反应的化学方程式 。 (2)若以H 2 O 2 溶液和MnO 2 在实验室中制备干燥的氧气...
【判断题】寒潮低温带给农业生物的影响的既有有利的一面,也有不利的一面。
【单选题】按照能量的消耗量分类,我们现在处于几类文明?
【单选题】按照能量的消耗量分类,我们现在处于几类文明?
【多选题】Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express important ideas in the passage. Some ...
A.
Wundt was influenced by earlier researchers who established a laboratory in Leipzig, Germany.
B.
Titchener broadened Wundt’s approach to all forms of mental activity.
C.
Wundt and others demonstrated that mental activity can be divided into more basic operations.
D.
Psychologists of Wundt’s school may have relied too heavily on introspective reports from research participants.
E.
Kulpe argued that Wundt’s research was unfairly criticized.
F.
Kulpe showed that some forms of mental activity are not observable by introspection.