下列关于俄罗斯的说法正确的是（　　）

随着经济水平的不断提高，小汽车越来越多地走进了普通家庭．下表为某小汽车的相关数据：

（1）汽车发动机是汽油机，发动机工作时，____ 冲程将内能转化为机械能．

（2）汽车启动时，需将钥匙插入钥匙孔内并旋转（相当于闭合开关），请你用笔画线代替导线将轿车的启动原理图连接完整．____ 

Jim：Hi, Kate！What's the weather like in Shanghai today?

Kate：Hi, Jim！It's sunny and warm here. I'm going to the zoo this afternoon.

Jim：Sounds good.

Kate：Jim, how's the weather in Beijing now?

Jim：It's cloudy. It's going to rain. So I can't fly a kite in the park.

Kate：Oh, I see.

Jim：Do you know the weather in Guangdong?

Kate：It's too hot. The children there usually go swimming in the river.

Jim：Oh, I like swimming, too. But I can't swim now. It's cold here.

若双曲线$\frac{x^2}{m}-y^2=1$的实轴长是离心率的2倍，则m=____