1.单选题- (共3题)
| A．绳子的弹力变大 | B．绳子的弹力不变 |
| C．绳对挂钩弹力的合力变小 | D．绳对挂钩弹力的合力变大 |
| A．在最高点a处的动能最小 |
| B．在最低点c处的机械能最小 |
| C．在水平直径右端b处的机械能最大 |
| D．在水平直径左端d处的机械能最大 |
| A．＋Q | B．＋2Q | C．+3Q | D．+4Q |
2.选择题- (共3题)
根据材料内容，选择正确答案。
One of my favourite things to do is hiking in mountains. Because nobody likes the idea of getting lost, I always prepare before every trip. But what's the best navigation tool, a Global Positioning System (GPS) or a good old map and compass? Five of my friends and I hiked through the mountains on a trail I marked. One team of three carried a GPS, and the other team used a map and compass.
It took the GPS team 3 hours and 11 minutes to get through the whole hike, however, it took the map and compass team only 2 hours and 49 minutes. The biggest problem the GPS team met was that they lost the satellite signal (卫星信号) in some places. With no map or compass, they had to walk around until they were in a place where the signal was good. The map and compass team was able to spot(认出) different landmarks, compare them to their maps and then use the compass to point them in the right direction.
When I head out on my future hikes, I'm bringing a map, a compass and a GPS to show me the way.
3.实验题- (共1题)
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【1】题量占比
单选题:(3道)
选择题:(3道)
实验题:(1道)
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【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：3
7星难题：0
8星难题：1
9星难题：0