单项选择题Which of the following statements does the author imply
单项选择题Which of the following elements is the most critical to online security according to the author
单项选择题The balances on their operating statements can not be called profits or losses, rather they are called surpluses or ______.
单项选择题Pure science, leading to the construction of a microscope, ______.
单项选择题According to the passage, the use of Antarctic krill as a food is an innovation whose future is ______.
单项选择题A scientist being interested in adding to our general knowledge about oxygen would probably call his approach ______.
单项选择题The cultural communication problems are becoming especially urgent for ______.
单项选择题The best title for the passage would be ______.
单项选择题It can be inferred from the passage that the author assesses the truth about opaque-2-maize in that ______.
单项选择题We learn from the first paragraph that ______.