求x值：4x2=25．
∵4x2=25
∴x2=254，
∴x=±52；
—We must keep _____ in the library.
—The woman said to me _____. [ ]
A. quiet; quietly
B. quietly; quietly
C. quietly; quiet
D. quiet; quiet
高血压合并糖尿病患者，血压应控制在（）
A.<130/80mmHg
B.<130/85mmHg
C.<135/85mmHg
D.<140/90mmHg
E.<150/90mmHg
