工作面放炮或卸压放炮时,躲炮半径不得小于150m,躲炮时间不得小于()分钟。A、20

题型:单项选择题

问题:

工作面放炮或卸压放炮时,躲炮半径不得小于150m,躲炮时间不得小于()分钟。

A、20

B、30

C、40

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题型:单项选择题

阅读理解。

                                                    Edison-style light bulb and CFLs

1. About 130 years ago, Thomas Edison of the USA invented the light bulb. Edison's bulb has turned night

    into day ever since. But today, many want to turn the light off.

2. The European Union recently decided that by 2009, people should stop using the Edison-style light bulb.

     Instead, they should use compact fluorescent lamps (CFLs节能灯).

3. "CFLs save energy and last longer. They can save money in the long run," said a British official. CFLs

     use 67 percent less electricity than the older bulbs. They last up to times longer. Scientists say that if

     everyone used CFLs, electrify use would be cut 18 percent. There would also be much smaller amounts

     of greenhouse gases given off.

4. But it's difficult to make people change their lighting habits. First the CFLs are more expensive. They cost

    eight times the price of the older bulbs. Many people don't like the CFL bulbs. They find it too bright. You

    cannot change the light of a CFL, either.

5. CFLs have been around for several years. However, the older lights still make up about two-thirds of total

    light bulb sales.

A. When to stop to use CFLs

B. Edison made the world bright

C. The older style lights are still used widely

D. The advantages of using CFLs

E. The disadvantages of using CFLs.

阅读以上5段语言材料,请找出与它们相对应的标题,并将其标号填入下列横线上。

1             2             3             4             5             

题型:单项选择题

在直径等于12cm的⊙O中,弦长6cm所对的圆周角等于多少度[ ]

A.120

B.60

C.30

D.30或120

题型:单项选择题


Dear Anna,
Thanks for the photo of your family. It’s very great. I like(喜欢)it very much. Here is my family photo. These are my
grandparents, and these are my father and mother. I am their daughter. Look at the boy. He is my cousin. His name is Bob. This is a happy(幸福的)family.
Your friend,
Alice
读信,完成所给句子。(5分)
1. This is the photo of                   ’s family.
2. Is Alice’s aunt in the photo?
                                    
3. Bob and Alice are                    .
4. Alice and Anna are                    .
5. Bob calls Alice’s mother                    .
题型:单项选择题

量具的原理是批在量仪的设计与使用中,偏离了()所致。

A.阿贝原则

B.定位原则

C.设计原则

题型:单项选择题

直流电药物离子导入时,药物离子进入人体的途径是()

A.皮下血管丰富处

B.汗腺、皮脂腺管口

C.皮肤角质层薄处

D.皮肤毛发稀少处

E.皮下脂肪丰富处

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