科学家通过宇宙探测仪发现金星大气层中含有物质X。X可以通过下列反应制取： CH2

Rules on how to be a fit kid

Being fit is a way of saying a person eats well, gets a lot of physical exercise, and has a healthy weight.   小题1: If you’re a kid who wants to be fit, here are three rules to live by.

1. Eat a variety of foods.

You may have a favorite food, but the best choice is to eat a variety.  小题2:  Taste new foods and old ones you haven’t tried for a while. Some foods, such as green vegetables, are more pleasing the older you get. Shoot for at least five servings of fruits and vegetables a day--two fruits and three vegetables.

2.    小题3: 

What does it feel like to be full? When you’re eating, notice how your body feels and when your stomach feels comfortably full. Sometimes, people eat too much because they don’t notice when they need to stop eating.   小题4:  And over a period of time, overeating can lead to unhealthy weight gain.

3. Limit screen time.

What’s screen time? It’ s the amount of time you spend watching TV or DVDs, playing video games, and using the computer. The more time you spend on these sitting-down activities, the less time available for active stuff, like basketball, bike riding and swimming.   小题5:

These rules aren’t magic. However, follow them most of the time and you can become a fit kid sooner or later.

A．Drink water and milk.

B．Listen to your body.

C．Eating too much can make you feel uncomfortable.

D．There’re a lot of discussions these days about fit kids.E. Try to spend no more than 2 hours a day on screen time.

F. Ask your parents to help you do your favorite activities regularly.

G. If you eat different foods, you’re more likely to get the nutrients your body needs.

在一定条件下，能使其安全储存，质量不发生其他异变的临界含水量

A.水分的平衡

B.安全水分

C.临界水分

D.水量控制

舌肿

以下关于Union描述正确的是（）

A.UNION将多个查询结果合并起来，形成一个完整的查询结果

B.UNION比较两个查询结果合，去掉相同的部分

C.UNION左右的结果集列必须相同

D.UNION左右的结果集列可以不同

管道施工后吹扫过程应（）。

A、先预吹

B、边加热边吹扫

C、边吹扫边敲击

D、最后检测吹扫效果