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Between the Sierra Nevada Mountains and the Rocky Mountains there is a large area of

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该怎么办呢？ What is there to do？ ()

他养成了躺在床上看书的习惯。 He has got into the habit to read books while lying in bed.

物体对光线的反射率随物体的颜色和表面平滑程度的差异而不同，颜色浅淡的、表面光滑的物体对光的反射率()。

A. 较低
B. 较高
C. 适中
D. 以上均对

Tenor is related to how we communicate, through speech or writing. ()