阅读短文，选择最佳选项。
As you are working, keep your eyes on your own test booklet (小册子) and answer document (答题卷).
If you have a question, raise your hand, but do not look around. If you are involved in any of the actions listed
below, you will be dismissed (让……离开) and your answer document will not be scored. Prohibited (禁止的)
behaviors include：
●continuing to write after time is called on each test (You must put your pencil down when time is called.)
●looking at another student's test booklet or answer document
●using any device to share or exchange information at any time during testing or during the break (all
electronic devices, including mobile phones and Mp4s, must be turned off from the time you are allowed to test
until you are dismissed after testing)
●trying to remove test materials, including questions or answers, from the test room
●not following instructions by the rules (规则) of the test center
●allowing a clock or mobile phone to sound in the test room If you finish before time is called, review your
work on the test you have just finished.
If you are sati shed with your answers, place your answer document inside your test booklet and close the
cover. Sit quietly until the teacher gives you further instructions.
You will have two tests in the morning and a short break between the tests. Do not 1eave the building during
the break. You must ask permission (允许) to leave the room during testing to go to the restroom; you will not
be allowed to make up (弥补) the time you miss.
You will be required to sit quietly until you are dismissed. After all answer documents and test booklets have
been collected, the teacher will dismiss you.
1. The passage is written mainly about ______. [ ]
A. the importance of the test
B. the rules of the test
C. the functions of the test
D. the results of the test
2. If a student uses his mobile phone during the break, he will . [ ]
A. be dismissed and get no score at all
B. be asked to turn it off and continue testing
C. be asked to stay in the test room for a long time
D. be ordered to remove the test materials from the test room
3. When a student finishes testing before time is called, the right order of what to do is .
①close the cover
②review the work on the test
③place the answer document inside the test booklet
④sit quietly until the teacher tells you what to do next [ ]
A. ②①③④
B. ④②①③
C. ②③①④
D. ③②④①
4. Which of the following is TRUE according to the passage? [ ]
A. Clocks can sound to tell students time during testing.
B. Students can walk out of the building during the break.
C. It's possible for students to make up the time they miss.
D. Students can't go to the restroom during testing without permission.
为阿伏加德罗常数的值，下列说法正确的是（ ）
的分子数为
的醋酸溶液中，离子和分子的总数为
