The word "strain" in line 23 is closest in meaning to（）
A. struggle
B. strength
C. strategy
D. stress
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The "white chalk cliffs of Dover" are mentioned in line 14 of the passage to（）
A. show where the plankton sediment first began to build up
B. provide an example of a plankton buildup that scientists cannot explain
C. provide all example of the buildup of plankton sediment
D. indicate the largest single plankton buildup on Earth
下列描述中不符合自知力不完整或无自知力的是( )。
A. 对自身状态的反映错误
B. 作为判断精神病的指标之
C. 对“自我”概念的错误认知
D. “自我认知”与“自我现实”的统一性的丧失
According to the passage, the most dramatic change to the oceans caused by plankton during the Cretaceous period concerned（）
A. the depth of the water
B. the makeup of the sediment on the ocean floor
C. the decrease ill petroleum-producing sediment
D. a decline ill the quantity of calcareous ooze on the seafloor
The Arts and Crafts Movement of the late nineteenth century strove to (revitalizing) handicrafts and applied arts (during) an (era of) increasing mass (production).（）
A. revitalizing
B. during
C. era of
D. mass production
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