课文及背诵段落填空。

1. Living with disability is ______ and ________. Everyday activities are more difficult than they are for others. 2. _______ history, great thinkers have used their creativity and ___________ to change the world.

3. Since then, Captain Fawcett has _________ __________ to many unusual places.

4. Their sleeping bags were warm and _________, so they all slept_________.

5.  Many people _________ that they understand ________ art.

用理想变压器给纯电阻负载供电时，为了增大输入电流，下列办法中可行的是（    ）

A．增加原线圈的匝数

B．增加副线圈的匝数

C．在副线圈上多串联一个电阻

D．使绕制线圈的导线粗一些