题目内容

Cell phones were used for making calls.

A. 对
B. 错

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PDAs gains wireless connectivity and were not able to send and receive E-mail.

A. 对
B. 错

Smartphones allow individual users to install, configure and run applications of their choosing.

A. 对
B. 错

Most standard cell-phone software offers a lot of choices for re-configuration.

A. 对
B. 错

丁达尔效应是（）的光学性质

A. 溶液剂
B. 溶胶剂
C. 混悬剂
D. 乳剂