Which of the following can make a cast shadow behave predictably?
A: Various light sources.
B: A flat surface
C: A bumpy surface.
D: A dark environment.
A: Various light sources.
B: A flat surface
C: A bumpy surface.
D: A dark environment.
举一反三
- Which of the following processes can make the best surface smoothness?
- It can be inferred from the passage that Europa and Antarctica<br/>have in common which of the following? ___ A: Both appear to have a surface with many craters. B: Both may have water beneath a thin, hard surface. C: Both have an ice can that is melting rapidly. D: Both have areas encased by a rocky exterior.
- Which glass surface treatment process is used for the glass curtain wall shown in the following picture?[img=825x511]1803a3150fd8b4e.jpg[/img] A: Chemical polishing. B: Glass painting. C: Glass surface coating. D: Glass surface coloring.
- 中国大学MOOC: Which of the following is a palpable sign of femur on the body surface?
- IT can be inferred from the passage that Europa and Antarctica have in common which of the following（） A: Both appear to have a surface with many craters B: Both may have water beneath a thin,hard surface C: Both have an ice can that is melting rapidly D: Both have areas encased by a rocky exterior