填空题

Companies need to take (action) () steps to increase exports.

【参考答案】

active

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单项选择题

According to the passage, which of the following does dietetics NOT refer to().

A．It uses the science of nutrition to construct diets in health and disease.
B．It uses the science of nutrition to select foods.
C．It uses the science of nutrition to create diets only for patients.
D．It uses the science of nutrition to prepare foods.

单项选择题

We can learn from the first paragraph that self-esteem is ().

A．kept as it is for a long time
B．not fixed
C．easy to improve
D．the most important