把一个正方体截去一个角，剩下的几何体最多有几个面（ ） A．5个面 B．6个面

阅读理解。

     Do you sweat, chew (嚼) your pencil, and feel butterflies in your stomach as your teacher hands out

a test? A lot of people get freaked out (兴奋) when it is time to take a test. It is natural to feel some stress

(压力) about taking tests. In fact, sometimes a little adrenaline (肾上腺素) is a good thing to jump-start you.

Here are some tips for taking tests:

     ● First, be sure you have studied properly. It sounds like a no-brainer, but if you are sure of the information,

you will have less reason to be worried.

     ● Get enough sleep the night before the test. Your memory recall (使想起, 回想) will be much better if you

have had enough rest. In a scientific study, people who got enough sleep before taking a math test did better

than those who stayed up all night studying.

     ● Listen closely to any instructions. As the teacher hands out the test, be sure you know what is expected

of you.

     ● Read the test through first. Once you have the test paper in front of you, read over the full test, checking

out how long it is and all the parts that you are expected to complete. This will allow you to estimate (估计)

how much time you have for each part and ask the teacher any questions. If something seems unclear before

you start, don't panic: ask.

     ● Focus (集中) on addressing each question one by one. As you take the test, if you do not know an answer, do not obsess (使困扰) over it. Instead, pass over the question and come back to it after you have answered

other questions.

     ● Relax. You might need a mini-break if you are so nervous that you blank out. Of course you cannot get

up and move around in the middle of a test, but you can wiggle (摆动) your fingers and toes, take four or five

deep breaths, or picture yourself on a beach or some other calm place.

     These tips should help most people, but some can get serious test-taking fear. You may need to ask a

teacher or counselor for help if you are one of them.

1. The underlined word "butterflies" means ________.

A. mad

B. smart

C. stupid

D. nervous

2. From the passage, we can know ________.

A. if we are nervous in the middle of a test, we can take pictures of ourselves

B. when we don't know some answers of the test, we must finish them right now

C. getting enough sleep the night before the test can help recall our memory easily

D. when we get the test paper we should read part of the test so that we can save time

3. The passage is mainly about ________.

A. how to do well in tests

B. how to read tests carefully

C. how to focus on questions of tests

D. how to ask a teacher for help about tests

某生产车间有一台抽风机，生产过程中易发生过负荷，工艺要求能自起动，抽风机配套的交流异步电动机参数为：额定电压6000V，额定功率850kW，额定电流97A，起动电流为额定电流的5.8倍，电动机最大转矩为额定转矩的2.2倍。电网参数：电网电压6000V，在电网最小运行方式下电动机端子三相短路时，流过保护的最小三相短路电流为9000A。电动机主回路电流互感器接于相电流，变比为150/5。电动机电源母线电压互感器变比为6000/100。

电动机实际起动时间为13s，下列哪个时间最适合过负荷保护装置动作时限？（）

A.26s

B.10s

C.18s

D.14s

刘某将自己两间破旧的房屋向保险公司投保10万元。为了取得保险赔偿金，趁月黑风高无人之时，点燃自己旧屋后离开，大火蔓延烧死房屋附近居民3人。警方当晚根据现场发现刘某留下的证据，因此在刘某向保险公司索赔前便将其逮捕。对刘某的行为构成：（）

A.保险诈骗罪

B.放火罪

C.故意杀人罪

D.故意毁坏公私财物罪

按容量计浓度为95%的未改性乙醇(瓶装500mL)

一类疫病的具体病种包括（）。

A.口蹄疫、炭疽、兰舌病、牛瘟、牛肺疫

B.非洲猪瘟、猪瘟、猪传染性水泡病

C.鸡瘟、非洲马瘟

D.结核病、狂犬病、猪丹毒