读图，回答下列问题：

在“探究影响导体电阻大小的因素”实验中，图中甲、乙、丙是镍铬合金丝，且l_甲=l_乙，S_乙=S_丙．

（1）实验中，根据____ 判断接入M、N两点间电阻的大小．

（2）若选择甲、乙两根导线进行实验，可以探究导体电阻的大小与____ 的关系．

（3）为了探究电阻大小与导体材料的关系，应该再选一个实验器材是____ ．

（4）为了使实验更精准，请你写出一条改进本实验的建议：____ ．

下面是几种常见的动物，有的还是人类的好朋友，请你仔细观察图中动物，回答下列问题：

Nancy：Hi，David．Welcome to my home．

David：Wow，____

Nancy：Thank you．

David：Is this your family photo?

Nancy：Yes．This is my mother．

David：Wow，she looks young．____

Nancy：She is a secretary．

David：Is your father a scientist?

Nancy：Yes，he works at a university．

David：____By car?

Nancy：No，he goes to work by bike．____

David：Great．He has a very healthy life．Look at your sister．____

Nancy：Yes,her favourite toy was lost．David,come to my bedroom．Let's play computer

David：Great

A．What does she do?

B．Your home is big and beautiful．

C．She looks worried．

D．How does he go to work?

E．He likes riding a bike．