What is the news item mainly about？
A. The work of the two Nobel laureates sheds light on the tiny building blocks of life-cells.
B. The work of the three Nobel laureates sheds light on the huge building blocks of life-cells.
C. The work of the three Nobel laureates sheds light on the tiny building blocks of life-cells.
D. The work of the three doctors sheds light on the tiny building blocks of life-cells.
查看答案
【C15】
At
B. After
C. Not until
D. Before
【C10】
A. talked
B. being talked
C. talked to
D. being talked to
寒邪阻滞气血，多见();火热之邪动血，可引起()病证。
Which of the following sentences is a COMMAND？
A. Watch your steps!
B. Don"t disturb me.
Come and have dinner with us.
D. Let me alone.
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