What "programs" sighted people to sleep at night?
A decrease in melatonin level.
B. An increase in melatonin level.
C. Personal habits.
D. Psychological hint.
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《水污染防治法》规定,省、自治区、直辖市人民政府可以对国家水环境质量标准中未作规定的项目,制定地方标准,并报国务院环境保护主管部门()。
A审核
B备案
C批准
D存档
国家秘密载体的制作、收发、传递、使用、(),应当符合国家保密规定。
A复制
B保存
C维修
D销毁
Technological advances have produced many benefits as well as problems in our life. However, just as the radiation from nuclear power plants in Japan has shown, many problems remain unsolved. What do you think of this? Write a composition of about 200 words on the following topic: Can Technology Solve the Problems that It Has Created? You are to write in three parts. In the first part, state clearly what your view is. In the second part, support your view with appropriate reasons. In the last part, bring what you have written to a natural conclusion or a summary. Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the instructions may result in a loss of marks.