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单项选择题

喷射混凝土抗压强度试验,喷射作用现场,正确做法是（ ）。

A.模板喷筑面朝下倾斜与水平夹角成80°
B.板喷筑面朝下倾斜与水平夹角成860°
C.模板喷筑面朝上倾斜与水平夹角成80°
D.模板喷筑面朝上倾斜与水平夹角成60°
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单项选择题
Body language is of great importance to humans. We carry many of the meanings through body movements. However, many forms of body language we consider to be fine in our country can get us into trouble in other parts of the world.
A smile is one of the most common examples in different countries. While Americans smile freely at strangers, in Russia this is considered strange and even impolite. In Asian countries a smile isn't necessarily an expression of joy but it can be used to express pain.
The acceptable physical distance is another major difference. In Latin America and the Middle East the acceptable distance is much shorter than what most Europeans and Americans feel comfortable with. Hand and arm movements as a form of body language are also very different among countries. Handshakes are usually acceptable almost everywhere, even between strangers; however, kissing on the cheek and touching on the shoulder or other body parts aren't. For many people in Asia and other parts of the world, such actions are seen as a violation （侵犯）of one' s personal space. This is why you should not touch others easily.
Eye contact（目光接触）is one of the forms of body language where the differences are most striking. In America and Latin America looking the other person in the eye is a sign of respect. But in Asian countries, prolonged（过长的）eye contact is especially rude, so you should try your best not to do that.
To humans, body language is ____.（　　）
A.important
B.funny
C.uncommon
D.strange
单项选择题
对于已经存在的室内污染源，应在摸清污染源特性及其对室内环境的影响方式的基础上，采用通风换气、撤出室内、封闭或隔离等措施，防止散发的污染物进入室内环境。
A．对
B．错
单项选择题
Once a month, just after sunset, trucks fill an outdoor parking lot in Los Angeles, California．Some trucks sell all kinds of food. Others have clothing for sale. These are known as fashion（时尚）trucks.
It's really fun to go through everything in the truck. The back of the truck is a small store. Clothing hangs on one side. Jewelry（首饰）and purses are on the other. The store looks colorful and is well organized. There is also a very small room for trying on clothes.
Jordana Fortaleza is one of the truck owners. She says the cost of owning a truck is much lower than paying for a store. And there is another reason to use a truck. You can take your business to your customers. But there are also difficulties.
The biggest problem is the weather. In winter, it's cold outside and there's no one around. Another problem is keeping the truck in good condition. When it breaks down, the repairs can take days. Business stops during the time. It happens at least once a year because her truck is 38 years old．
Meagan Rogers is a fashion school graduate. She says the job market is so hard now, but with a fashion truck she's able to start earning money while her classmates are still working without pay.
What would be the best title for the text?（　　
A.TipsforRepairingYourTruck
B.HowtoStartaClothesStore
C.TheStoryofaFashionSchool
D.FashionTrucksinLosAngeles
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