【单选题】Leukemia is a kind of cancer in which abnormal white blood cells grow in an uncontrolled manner. These abnormal cells interfere with the production of normal white blood cells, which fight infection. ...
A.
Leukemia is a very serious disease
B.
Myeloid cells differ from lymphoid cells in that myeloid cells combat bacteria infections
C.
Acute eukemia comes more speedily to a crisis than does chronic leukemia
D.
Several ways are available to prolong remission in acute myeloid leukemia patients
E.
Researchers have discovered that leukemia may be caused by invasion of viruses, exposure to radiation, or contact with harmful chemicals
F.
In chronic leukemia, the abnormal white blood cells not only resemble normal white blood cells but function normally to some extent in the early stages of the disease Paragraph 2 ______.