请对以下实验方案进行补充或解释。 (1)取土壤样品溶于水，用玻璃棒蘸取上层清液滴
题型：填空题
问题：
请对以下实验方案进行补充或解释。
(1)取土壤样品溶于水，用玻璃棒蘸取上层清液滴在____ ，便可粗略测定土壤的酸碱度。
(2)将混合气体先后通过足量的____， 可除去氢气中的少量的氯化氢气体和水蒸气。
(3)除去K2SO4溶液中的少量KOH，不能选用稀盐酸的原因是________。
题型：填空题
阅读理解
I entered high school having read hundreds of books. But I was not a good reader. Merely bookish,
I lacked a point of view when I read. Rather, I read in order to get a point of view. I searched books for
good expressions and sayings, pieces of informatio
n, ideas, themes-anything to enrich my thought and
make me feel educated. When one of my teachers suggested to his sleepy tenth-grade English class that
a person could not have a "complicated idea" until he had read at least two thousand books, I heard the
words without recognizing either its irony(嘲讽)or its very complicated truth. I merely determined to
make a list of all the books I had ever read. Strict with myself, I included only once a title I might have
read several times.(How, after all, could one read a book more than once?)And I included only those
books over a hundred pages in length.(Could anything shorter be a book?)
There was yet another high school list I made. One day I came across a newspaper article about an
English professor at a nearby state college. The article had a list of the "hundred most important books
of Western Civilization." "More than anything else in my life," the professor told the reporter with finality
(firmly), "these books have made me all that I am." That was the kind of words I couldn't ignore. I kept
the list for the several months it took me to read all of the titles. Most books, of course, I hardly
understood. While reading Plato's The Republic, for example, I needed to keep looking at the
introduction of the book to remind myself what the text was about. However, with the special patience
and superstition(迷信)of a schoolboy, I loo
ked at every word of the text. And by the time I reached
the last word, pleased, I persuaded myself that I had read The Republic, and seriously crossed Plato off
my list
1. On hearing the teacher's suggestion of reading, the writer thought _______.
A. one must read as many books as possible
B. a student should not have a complicated idea
C. it was impossible for one to read two thousand books
D. students oug
ht to make a list of the books they had read
2. While at high school, the writer _______.
A. had plans for reading
B. learned to educate himself
C. only read books over 100 pages
D. read only one book several times
3. The writer's purpose in mentioning The Republic is to _______.
A. explain why it was included in the list
B. describe why he seriously crossed it off the list
C. show that he read the books blindly though they were hard to understand
D. prove that he understood most of it because he had looked at every word
4. The writer provides two book lists to _______.
A. show how he developed his poi
nt of view
B. tell his reading experience at high school
C. introduce the two persons' reading methods
D. explain that he read many books at high school