问题 阅读理解
阅读理解
      In order to know a foreign language thoroughly(完全地), four things are necessary. First, we must
understand the language when we hear it spoken. Secondly, we must be able to speak it ourselves,
correctly with confidence(自信) and without hesitation(犹豫). Thirdly, we must be able to write it. We
must be able to make sentences that are correct in grammar.
     There is no short way to succeed in language learning. A good memory(记忆) is a great help, but it is
not enough only to memorize the rules from a grammar book. It is no much use learning by heart long lists(一览表) of words and their meanings, studying the dictionary and so on. We must learn by using the
language. If we are pleased with a few rules we have memorized, we are not really learning the language. We must "Learn through use". Practice is important. We must practise speaking and writing the language whenever(无论何时) we can.

1. The most important things to learn a foreign language are_______.

A. understanding and speaking
B. hearing, speaking, reading and writing
C. writing and understanding
D. memorizing and listening

2. Someone hears and writes English very well, but he speaks it very badly. This is because____.

A. he doesn't understand the language when he hears it spoken
B. he doesn't have a good memory
C. he always remember lists of words and their meanings
D. he often hesitates to practise speaking it

3. One can never learn a foreign language well only by_______.

A. much practice
B. studying the dictionary
C. learning through use
D. using the language

4. Which of the following is the most important in learning a foreign language?

A. A good memory.
B. Speaking and writing.
C. Practice.
D. Writing.

5."Learn through use" means______.

A. we use a language in order to learn it
B. we learn a foreign language in order to use it
C. we can learn a language well while we are using it
D. both B and C


答案

1-5: BDBBD

单项选择题

某电厂新建2X300MW国产亚临界燃煤机组,机组以发电机一变压器组单元接线接入220kV系统双母线,220kV配电装置采用双母线母联兼旁路母线接线方式,启动/备用电源由老厂110kV母线引接,主变压器中性点和启动/备用变中性点经隔离开关接地,根据系统需要可直接接地或不接地运行,发电机中性点经二次侧接有电阻的单相变压器接地,高厂变压器及启备变压器低压侧中性点经电阻接地,电阻为9.1Ω,400A。发电机次暂态电抗为16.01%。高压启动/备用变压器的中性点采用固定接地方式,主变压器中性点经隔离开关接地方式,高压厂用变压器及启/备变半穿越阻抗为21%,高压厂用变压器及高压启动/备用变压器均采用分裂绕组型变压器,高压厂用电设两段公用段及脱硫段,分别由机组高压厂用工作段供电。

本工程动力用直流负荷统计如下:经常负荷电流4.5A,事故放电初期(1min)电流768A,持续事故放电(30min)电流433.2A,持续事故放电(60min)电流215A,事故放电末期或随机放电电流为147A,另外假定本工程蓄电池事故放电终止电压为1.90V,此时蓄电池组1min放电时的容量换算系数为1.18,29min为0.764,30min为0.755,59min为0.548,60min为0.520,随机负荷的容量换算系数为1.27,则本工程动力用蓄电池组容量应选择( )为宜。

A.800Ah;
B.1200Ah;
C.1500Ah;
D.2000Ah。

单项选择题 A1/A2型题