Question

Laboratory work is your chance to learn science firsthand. It can be fun but you must be careful to prevent injury. Listen closely when your teacher reads and explains the rules before your first lab lesson.

LABORATORY  RULES
Throughout the   lesson	·Do not   enter the science lab without the teacher’s permission. No food or drinks are   to be allowed in the science lab.
Before the   Experiment	·Read all   instructions carefully before every experiment. · Prepare   all apparatus（仪器）and arrange them so that you will   not knock them over while doing   the experiment.
During the   Experiment	·If you are   unsure of how to use any apparatus or how to operate, ask your teacher for help.   ·Never smell   or taste chemicals unless your teacher gives permission.
After the   Experiment	·Wash all   apparatus after use and return them to the places where they were. ·Throw waste   materials in proper waste baskets.
First Aid	·Report all   accidents to your teacher immediately. ·If you   spill（溅出）any chemicals onto your body or clothing,   wash with plenty of water   and report to your teacher.

1. 1.
   Your teacher will probably tell you the rules above ______ the first lab lesson
   1. A.
      before
   2. B.
      since
   3. C.
      during
   4. D.
      after
2. 2.
   Before every experiment, you should______.
   1. A.
      taste the chemicals first
   2. B.
      clean all the apparatus
   3. C.
      read all instructions carefully
   4. D.
      report all the accidents to the teacher
3. 3.
   When you are not sure how to use all apparatus,______.
   1. A.
      try them on your own
   2. B.
      read the rules carefully
   3. C.
      ask your teacher for help
   4. D.
      put them back
4. 4.
   It is clear that you can ______.
   1. A.
      bring food into the lab
   2. B.
      enter the lab at any time
   3. C.
      smell chemicals as you like
   4. D.
      learn science directly in the lab
5. 5.
   If you get chemicals on the clothing, you can find ways to solve it in the part ______.
   1. A.
      Before the Experiment
   2. B.
      First Aid
   3. C.
      During the Experiment
   4. D.
      After the Experiment

Answer 1

ACCDB
试题分析:本文讲述了实验室的一些规章制度。一共包含五点，分别谈论了做实验前，做实验时，做实验后，以及万一突发情况发生如何急救。
1.细节理解题 句意:由文章第一句话可知，本题是在问我们通常老师在什么时候告诉我们这些规则，由方框上面第一段可推断，这些规章制度要在上第一节实验课前讲述。故选A为正确选项。
2.细节理解题  由表格二的第一句Read all instructions carefully before every experiment.可知，应该在每节实验前仔细地看这些说明。可知C为正确选项。
3.细节理解题  由表格三If you are unsure of how to use any apparatus or how to operate, ask your teacher for help.可知，如果实验时不能确信怎样使用这些仪器，应问老师。可知C为正确选项。
4.推理判断题 本文是关于实验操作的规则，所以在实验室里能学到科学方面的知识。本文第一句话Laboratory work is your chance to learn science firsthand.告诉我们实验室学习给你第一手机会去学习自然科学。可知D为正确选项。
5.细节理解题 由最后一个表格可知，它介绍了化学药品溅在衣服上的处理办法。可知B为正确选项。
考点：科普环保类短文阅读。