题干

在“观察植物细胞的质壁分离和复原”实验中,对紫色洋葱鳞片叶外表皮临时装片进行了三次观察和两次处理.下列有关叙述正确的是(  )

A:第一次观察为低倍镜观察,后两次为高倍镜观察

B:第一次处理滴加的液体为清水,第二次滴加的液体为0.3g/ml的蔗糖溶液

C:若将紫色洋葱鳞片叶的外表皮换成内表皮,则不会发生质壁分离

D:紫色洋葱鳞片叶外表皮中不属于原生质层的有细胞壁、细胞核和细胞液

上一题 下一题 0.0难度 选择题 更新时间:2019-02-15 06:37:29

答案(点此获取答案解析)

D

同类题4

阅读短文,从每题所给的四个选项(A、B、C、和D)中,选出最佳选项.

        Salvador Dali (1904-1989) was one of the most popular of modern artists. The Pompidou Centre in Paris is showing its respect and admiration for the artist and his powerful personality with an exhibition bringing together over 200 paintings, sculptures, drawings and more. Among the works and masterworks on exhibition the visitor will find the best pieces, most importantly The Persistence of Memory. There is also L’Enigme sans Fin from 1938, works on paper, objects, and projects for stage and screen and selected parts from television programmes reflecting the artist's showman qualities.

        The visitor will enter the World of Dali through an egg and is met with the beginning, the world of birth. The exhibition follows a path of time and subject with the visitor exiting through the brain.

        The exhibition shows how Dali draws the viewer between two infinities (无限). “From the infinity small to the infinity large, contraction and expansion coming in and out of focus: amazing Flemish accuracy and the showy Baroque of old painting that he used in his museum-theatre in Figueras,” explains the Pompidou Centre.

        The fine selection of the major works was done in close collaboration (合作)with the Museo Nacional Reina Sofia in Madrid, Spain, and with contributions from other institutions like the Salvador Dali Museum in St. Petersburg, Florida.