单项选择题

A. In front of the check-in. B. At the departure gate.
C. In a ship. D. On a plane.
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单项选择题
The underlined words these developments in paragraph 2 most probably refer to ______.
A. the acts of violence against scientists
B. the use of animals in research
C. the techniques of planting bombs in cars
D. the establishment of new animal protection organizations
单项选择题
Which of the following is the main topic of the passage
A. The difference between sodium chloride and potassium chloride.
B. The function of slat in daily life.
C. A comparative study of slat consumption habits in some countries.
D. The relationship between salt consumption and high blood pressure.
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