LIN数据总线系统的电气性能对网络结构有很大的影响，网络节点数不仅受标识符长度的限制，而且受总线物理特性的限制。下面说法正确的是（）。

A:节点数不要超过16个，否则网络阻抗会降低 B:LIN数据总线系统每增加一个节点大约使网络阻抗降低3％ C:LIN数据总线最小位流传输速度限定为1kb/s D:节点可以达到64个

LIN的含义是（）

A:汽车网络 B:车上媒体网络 C:控制器局域网 D:局部连接网络

有关奥迪车系的LIN总线系统叙述不正确的是（）

A:车上各个LIN总线系统之间的数据交换是由控制单元通过CAN数据总线实现的； B:LIN总线是CAN总线网络下的子系统，是一种辅助型的总线网络； C:LIN从控制单元通过LIN主控制单元进行LIN系统的自诊断。 D:LIN从控制单元的软件内设定了一个周期，这个周期用于决定何时将哪些信息发送到LIN数据总线上多少次。

LIN总线的偏置电压为（）

A:12伏特 B:2.5伏特 C:5伏特 D:7.5伏特

Letter A
Dear Rose,
I like your programmes very much. I’m now writing to ask you something about American social customs. My American friends want me to join them in their dinner party. I am very happy and have decided to go, but I’m a little worried about it, too. The social customs in my country are very different from here, so I’m afraid of making mistakes.
Should I bring a present, such as sweets or flowers Should I arrive on time or a little late At the dinner table, how can I know which fork or knife to use How can I let the family know that I’m thankful for their kindness

Letter B
Dear Wang Lin,
It’s a good idea to bring a small present when you go to a dinner party. Flowers are always nice, or you may bring a bottle of wine if you know that your friends drink it.
You should arrive on time or five to ten minutes late. Don’t get there early. If you’re going to be more than fifteen minutes late, you should call and tell them.
Try. to be free at the dinner table. If you don’t know about choosing the right fork or knife, just watch the other people, and follow them. If you still have no idea of what to do, ask the person next to you.
If you like the food, say so. Of course, you’ll thank them for the meal and for their kindness. It’s also a good idea to send a thank you card the day after.

Rose is possibly ______.

A:a good housewife B:a TV hostess C:a member of the dinner party D:a friend of Wang Lin’s

Dad, this is （） friend, Lin Tao.

A:mine   B:my  C:me

Letter A
Dear Rose,
I like your programmes very much. I’m now writing to ask you something about American social customs. My American friends want me to join them in their dinner party. I am very happy and have decided to go, but I’m a little worried about it, too. The social customs in my country are very different from here, so I’m afraid of making mistakes.
Should I bring a present, such as sweets or flowers Should I arrive on time or a little late At the dinner table, how can I know which fork or knife to use How can I let the family know that I’m thankful for their kindness

Letter B
Dear Wang Lin,
It’s a good idea to bring a small present when you go to a dinner party. Flowers are always nice, or you may bring a bottle of wine if you know that your friends drink it.
You should arrive on time or five to ten minutes late. Don’t get there early. If you’re going to be more than fifteen minutes late, you should call and tell them.
Try. to be free at the dinner table. If you don’t know about choosing the right fork or knife, just watch the other people, and follow them. If you still have no idea of what to do, ask the person next to you.
If you like the food, say so. Of course, you’ll thank them for the meal and for their kindness. It’s also a good idea to send a thank you card the day after.

Rose is possibly ______.

A:a good housewife B:a TV hostess C:a member of the dinner party D:a friend of Wang Lin’s