unless 意为“除非”,为连词,引导让步状语从句。该句前后主语一致都为 bacteria,因此后半句中省略了主语与 be 动词,主语 bacteria 与动词 view 之间是被动关系,表示细菌被观察。故原句为 The bacteria are invisible unless (the bacteria are) viewed with a microscope.故正确答案为 viewed。
试题来源: 解析 viewed 【详解】 考查状语从句中的省略。句意:除非用显微镜看,细菌是隐形的。时间、条件等状语从句中的主语与主句主语一致或是it,并且从句谓语有be的形式时,主语和be一同省略。此句补充完整形式是…unless they are viewed with a microscope。故填viewed。反馈 收藏 ...
The oldest technique was metal shadowing, following freeze-drying; then Hall (1955), Huxley (1956), and Brenner & Horne (1959) introduced ‘negative staining’ (the application of a previous light-microscopic method for seeing bacteria). Small particles, attached to a grid, are immersed in a...
an instrument which makes very small objects able to be seen magnifying them greatly.Germs are very small, and can only be seen with the aid of a microscope.microscopio ˌmicroˈscopic(-ˈsko-)adjective seen only by the aid of a microscope.microscopic bacteria.microscópico ...
答案:viewed.考查单词填空.根据句意及句子结构,要填入viewed, bacteria与view之间是动宾关系,用"unless+过去分词"作状语. 细菌是看不见的除非用显微镜. 结果一 题目 The bacteria are invisible unless___ (view) with a microscope. 答案 答案:viewed.考查单词填空.根据句意及句子结构,要填入viewed, bacteria与...
试题来源: 解析 【解析】【答案】viewed【解析】考查状语从句中的省略。时间、条件等状语从句中的主语与主句主语一致或是it,并且从句谓语有be的形式时,主语和be一同省略。此句补充完整形式是.unless they are viewed with a microscope除非用显微镜看,细菌是隐形的。 反馈 收藏 ...
A simulated view through a microscope on bacterias in the shape of Florida.(series),站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、
Students will often view prepared slides under the microscope to save time by eliminating the slide preparation process. The compound microscope can be used to view a variety of samples, some of which include: blood cells, cheek cells, parasites, bacteria, algae, tissue, and thin sections of...
Physiciansusedmicroscopetoexaminebacteriainbloodcells.Materialscientistsandengineersusedthemtostudythecrystalstructureswithinametalormetalmixturesandtoexaminecomputerchipsinothertinyelectronicdevices.Biologistsobservedalgae（海藻)andprotozoa（原生动物）andothersinglecellorganismunderthemicroscope.- Thesimplestopticalmicroscopeisa...
She observed the bacteria under the microscope. 6 Telescope Can be refracting or reflecting based on lens/mirror use He preferred using a reflecting telescope due to its clarity. 4 Microscope Uses multiple lenses for high magnification The compound microscope provided a detailed view of the cell ...