在常温下,将一定体积的某 NaOH 溶液分成两等分,与pH 均为2的一元酸 HA、HB恰好中和,消耗两种酸溶液的体积分别为V1、V2(V1≠V2)。则下列叙述中正确的是
A.若 Vl>V2,则说明 HA 的酸性比 HB的酸性强
B.中和后得到的两种溶液的 pH 均为 7
C.分别将两种酸溶液稀释10 倍后溶液的 pH 均为3
D.分别往等体积的两种酸溶液中加人足量锌粉,充分反应后产生的 H2的体积相等
Everybody was touched _____ words after they heard her moving story.
A.beyond | B.without | C.of | D.in |
One of the most important questions they had to consider was _____ of public health.
A.what | B.this ![]() |
C.that | D.which |
Encourage your children to try new things, but try not to ___ them too hard.
A.draw | B.strike | C.rush | D.push |
The computer was used in teaching. As a result, not only__________, but students became more interested in the lessons.
A.saved was teachers’ energy | B.was teachers’ energy saved ![]() |
C.teachers’ energy was saved | D.was saved teachers’ energy |
The children all turned ____ the famous actress as she entered the classroom.
A.looked at | B.to look at ![]() |
C.to looking at | D.look at |