红宝石晶体作为固体激光材料需加入()左右的铬离子。A、5% B、0.5% C、0.05%

题型:单项选择题

问题:

红宝石晶体作为固体激光材料需加入()左右的铬离子。

A、5%

B、0.5%

C、0.05%

D、0.1%

考点:无线电装接工考试高级无线电装接工高级无线电装接工题库
题型:单项选择题

形成高带耐受的细胞是()。

A.B细胞

B.T细胞

C.T细胞和B细胞

D.单核细胞

E.所有上述因素

题型:单项选择题

患者,男,16岁。近3年来逐渐变得少语少动,不与人交往,孤僻离群,对亲友冷淡,不讲究个人卫生,有时发呆。此患者最可能的诊断是()。

A.青春型精神分裂症

B.品行障碍

C.单纯型精神分裂症

D.偏执性精神病

E.人格障碍

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阅读理解

         You  know Australia is a big country, but you may not know how easy it is to get around. The

untouched beaches that go for miles and deserts that touch the horizon are just there, waiting to be

reached and explored. Following are the different ways you can explore our vast country.

     Getting around Australia Air

     Flying is the best way to cover large distances in a short time. You can spend more time on the

Australia's can't-miss landscapes and relaxing lifestyle. Moreover, competition among airlines makes

great flying fees available for you.

      Drive

     Australia has a vast network of well-maintained roads and some of the most beautiful touring routes

in the world. You have no difficulty finding car rental companies at major airports, central city locations,

suburbs and attractions.

     Bus

   Bus travel in Australia is comfortable, easy and economical. Buses generally have air conditioning,

reading lights, adjustable seats and videos. Services are frequent, affordable and efficient.

     Rail

     Train travel is the cheapest and gives you an insight into Australia's size and variety, all from the

comfort of your carriage. Scheduled services are a great way to get quickly between our cities and

regional centers.

     Ferry( 轮渡)

     The Spirit of Tasmania runs a passenger and vehicle ferry service between Melbourne and Tasmania

nightly. Extra services are running during summer rush hours. Sea-link ferries connect South Australia

and Kangaroo Island several times a day. Ferries connect suburbs in our capital cities.

     Walk

     With easy-on-the-feel pedestrian streets, walking is a great way to get around our cities.

     Besides all of above, you can also experience some of the longest tracks and trails in the world in

central Australia-impressive journeys of a thousand kilometers or more that can take several weeks to

complete.

1. The underlined word "untouched" (in the 1st paragraph) means ____  .

A. secure    

B. special      

C. natural    

D. artificial

2. Which of the following is TRUE about traveling in Australia?

A. More travelers make the flying fees among airlines higher than before.

B. You can easily rent a car to explore its most beautiful touring routes.

C. Taking a bus tour is the most comfortable,  economical  and efficient way.

D. Train services can offer you more comfort than any other means of transport.

3. Ferry service between Melbourne and Tasmania usually runs  _____.

A. only at night hours      

B. only during rush hours

C. several times a day      

D. between different cities

4. From the passage, we know that _____ .  

A. pedestrian walking is a great way to travel between cities

B. traveling in Central Australia is time-consuming

C. Central Australia has the world's longest railway line

D. you have to walk over a thousand kilometers in Australia

题型:单项选择题

一般情况下,放样的截面应不应该是闭合图形。()

A、不应该

B、应该

C、有时应该

D、以上都正确

题型:单项选择题

岩心装图时,若发现岩电矛盾层,应根据电测解释及时修改岩心描述。()

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