What do we leam about Ana Castro from the last paragraph？
A. She will be deported sooner or later．
B. She is allowed to stay permanently．
C. Her case has been dropped．
D. Her fate remains uncertain．
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我国规定硝酸钠(钾)只用于肉制品，其最大使用量为()。
A. 0．15g／kg
B. 0．20g／kg
C. 0．25g／kg
D. 0．30g／kg
E. 0．50g／kg
为什么要使用食品添加剂？使用食品添加剂应遵循哪些原则？
Paragraph 4 __________？ 查看材料
A. What exactly is science.
B. How do you find an explanation.
C. What topics do you need.
D. How do you answer your child"s questions.
E. Where does your child study science.
F. How do you set up the experiment on salt and water，
Paragraph 3 __________ ~ 查看材料
A. What exactly is science.
B. How do you find an explanation.
C. What topics do you need.
D. How do you answer your child"s questions.
E. Where does your child study science.
F. How do you set up the experiment on salt and water，
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