【单选题】【消耗次数：1】
用湿润的pH试纸测定溶液的pH，不变的是（）。
①
<img class="kfformula" src="20200629/1593410377146261.png" data-latex="{Na}_{2}{SO}_{4}" width="84" height="32"/>溶液
②
HCl溶液
③
NaOH溶液
④
氨水
参考答案：
复制
纠错
相关题目
【单选题】
在采访中，记者既要"身入"，又要"心入"。"心入"，就是要有强烈的社会责任感， 要对客观事物进行由表及里的分析，还要().
①
A.广泛地接触群众
②
B.多方面地挖掘材料
③
C.细心地掂量各种材料的价值
④
D.细心地掂量各种材料的价值
【多选题】
Whatdoestheword"steal"(thelastpara.)mean?<br/>
【单选题】
F．H．奥尔波特（1924）指出，社会心理学是"研究个体的社会行为和（）的学科"。
①
A.社会心理
②
B.社会意识
③
C.社会知觉
④
D.社会观念
【单选题】
执行下面程序：main(){intx=1,y=1,z=1;x=x+++y+++z++;printf("%d,%d,%d",x,++y,z++);}输出的结果为（）
①
4，3，2
②
3，3，2
③
3，3，3
④
3，2，2
随机题目
【单选题】
To succeed in our future goal, [] we students really need to do is to study as hard as possible.
①
that
②
how
③
what
④
why
【单选题】
The drivers are told to drive carefully on the radio. Find any misplaced modifier in the sentence.
①
on the radio
②
the
③
carefully
【单选题】
The trees stand nearly barren; their leaves lay on the ground. Identify the mistake in the sentence.
①
stand
②
barren
③
leaves
④
lay
【单选题】
I would accept that there was a bias in some key areas of British life, [] that bias has now gone.
①
or
②
and
③
but
④
so
【单选题】
He argued that it is the youths duty to find the problems in the society [] solve the problems in the society.
①
or
②
and
③
but
④
so
【单选题】
They are sweeping the floor wearing masks. Find any misplaced modifier in the sentence.
①
sweeping
②
the
③
wearing masks
【单选题】
Professor Smith, together with twenty of his students, [] coming to our school in May for a short visit.
①
is
②
are
【单选题】
One of the best ways [] can protect the environment is sustainable development.
①
which
②
in which
③
how
④
that