数值接近其真实值的程度 The extent to which a value approaches its true value
9(a)1evaporation of water from leaf / stem / plant;diffusion of water vapour;3through stomata;4down concentration gradient;any three - 1 mark each(b)temperature rise increases the rate of transpiration levaporation / ORA;2warm air can contain more water (vapour) / ORA;3increases concentratio...
6 (a)What is meant by the term transgenic organism?(2)1. contains gene /DNA /allele /genetic material;2. from a different species;(b)(i) Give an example of a current or potential use of a transgenic animal.(1)1. producing (human) organs;2. named animal making antibodies /proteins ...
这里meant 是mean 的被动语态。例(1)：主动语态： “Forthrightness” means what?被动语态： What is meant by “forthrightness”?例(2)：主动语态： Rita writes a letter.被动语态： A letter is written by Rita.例(3)：主动语态： 一辆车撞死了行人 被动语态： 行人被一辆车撞死...
(b)State what is meant by the terms(i) element,(substance that) cannot be split up/ broken down into (two or more) simpler substances by chemical means1...OR(substance) made of atoms with the same atomic number/ number of protons/ proton number.on number... [1](ii) compound,(two...
4 (a) State what is meant by the term polarisation when applied to a wave.[1](b)Explain why only transverse waves can be polarised.[2](c)Some films released have enabled viewing in three dimensions (3D). This can be done using two superimposed polarised images on the screen. One of ...
在某小学进行体检时,发现有少量学生吵嘴有轻度溃疡,思疑可能是某营养素缺少, 并进行了相应的实验室检查。该营养素及其相应的实验室检测项目分别是:①维生素 B1②维生素 B2③红细胞转酮醇酶活性系数④全血谷胱甘肽复原酶活力系数
6(a) Explain what is meant by(i) a progressive wave,[2](ii) the diffraction of a wave.[2](b) Two microwave sources S1 and S2 are situated as shown in Fig. 6.1. The waves emitted by the two sources are in phase and are polarised in the same plane.1》P -5.0cm o-1S2一一3.2...
after Dealing with the Trials and Tribulations of the Great British Public in Her Daytime Chat Show, TRISHA GODDARD Is Unlikely to Be F... Byline: By Maria Croce 被引量: 0发表: 0年 Playing to His Strengths, the Beverly Hills Brit Who's a Self-Help God; Lecture-Circuit "Rock Star"...
解析 The frequency of a progressive wave is the number of cycles of the wave that pass a fixed point per unit time. 频率是指单位时间内波形重复的次数。对于进行波来说,频率指的是单位时间内波形经过某一点的次数。 简而言之,频率代表了波的振动速度,它决定了波的音调或颜色。