How can sharks find their quarries
A. By good sense of water waves made by quarries.
By good sense of smell and electrical magnetic power.
C. By good sense of light.
D. By good sense of bloo
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It is so warm and ______ by the fire that I feel like sleeping.
A. dusty
B. lustrous
C. glossy
D. cosy
Why American scientists are developing these maps
A. To estimate the extreme weather.
B. To develop the satellite technology.
C. To improve agricultural output.
D. To learn how to change information to maps more efficiently.
What is the author's attitude toward the claims made by advocates of health foods
A. very enthusiastic.
B. somewhat favorable.
C. neutral.
D. skeptical.
微粒分散体系中微粒的动力学性质表现在
A. 丁泽尔现象
B. 布朗运动
C. 电泳
D. 微粒的双电层结构
E. 微粒的大小