随着温度的升高，液体的动力粘度（），气体的动力粘度（）。
A.增大／减小
B.增大／增大
C.减小／减小
D.减小／增大
参考答案：D
It's cold outside. Please tell him ______ her coat. [ ]
A. don't take off
B. not to take off
C. don't put on
D. not to put on
“学生饮用奶”富含维生素D，有助于人体吸收（ ）
A．铁
B．钙
C．碘
D．锌
