关于下列四幅图的说法，正确的是

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关于下列四幅图的说法，正确的是（）

A：甲图中估测油酸分子直径时，可把油酸分子简化为球形处理

B：乙图中，显微镜下看到的三颗微粒运动位置连线是它们做布朗运动的轨迹

C：烧热的针尖，接触涂上薄蜂蜡层的云母片背面上某点，经一段时间后形成图丙的形状，则说明云母为非晶体

D：丁图中分子间距离为r₀时，分子间作用力F最小，分子势能也最小

上一题下一题 0.0难度选择题更新时间:2019-12-05 02:50:18

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A,D

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What to Bring When Visiting Lijiang of Yunnan
Welcome to Lijiang. Lijiang is a nice place to visit. If you visit Lijiang, you’d better do as the following.

Needs	Reasons
1. Hat and sunglasses	The Lijiang’s sun can be quite shiny even during winter, so remember to bring a hat and sunglasses.
2. Raincoat or umbrella	It’s hard for us to know Lijiang’s weather, so it is necessary to bring an umbrella or a raincoat to Lijiang, even if it is sunny.
3. Water	A day in Lijiang you may be very thirsty, so make sure that you bring a bottle of water with you.
4. Camera	There will be lots of chances to take photos on your visit to Lijiang, so make sure to bring your camera. Don’t forget to bring more batteries so that you won’t miss anything!
5. Watch	There are many sights and gift shops in Lijiang. Bring a watch, so you can arrange (安排) your time.

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