题干

V L硫酸铝溶液中含Al3+的质量为m g,则溶液中SO42的物质的量浓度为:                                                       

A:mol·L-1

B:mol·L-1

C:mol·L-1

D:mol·L-1

上一题 下一题 0.0难度 选择题 更新时间:2017-06-03 12:38:03

答案(点此获取答案解析)

B

同类题1

请从下面两题中任选一题作文。

      一:树要成材,需要园丁的修剪;玉要成器,需要工匠的打磨;青春,同样需要雕琢,才会绽放绚丽的光彩。

      请以“青春需要雕琢”为题目,写一篇文章。

      要求:①除诗歌外,文体不限,可以记叙经历、抒发感情、发表见解等;②字迹工整,书写规范,字数600~800字:③文中请不要出现真实的姓名、校名;④文中不得引用、抄袭本试题卷阅读理解部分的材料。

      二:请阅读下面材料,按要求作文。

      商人请人们帮忙把陷在泥泞中的货车拖出来,并约定按每人出力的大小支付酬劳。两个滑头混在人群中,喊着响亮的号子,做出夸张的表情,但并不真正用力。事后,两个滑头只分到很少一点钱。他们去质问商人,商人说:“我没有注意你们的号子、表情,我只注意你们留下的脚印。”众人朝商人手指的方向望去,两个滑头的脚印都非常浅,而那些真正卖力气的人,脚印都深深地印在土地上。

      要求:①根据材料,自选角度,自拟题目,写一篇文章。②除诗歌外,文体不限,可以记叙经历、抒发感情、发表见解等;③字迹工整,书写规范,字数600~800字;④文中请不要出现真实的姓名、校名;⑤文中不得引用、抄袭本试题卷阅读理解部分的材料。

同类题3

完形填空。

    Vandna loved sports and did well in her lessons at her high school in California. When a headache disturbed the 15-year-old girl's walk to class, she 1 it.

    “It was 2.” she thought, “Just a headache—harmless”

But when walking to her next class, she was 3 and collapsed to the floor. 4 she could hear other talking, she couldn't speak. She was 5 to the hospital in an ambulance. Tests indicated Vandna had a stroke affecting the right side of her brain, thus affecting the 6 side of her body.

    What was worse, the stroke caused her brain to began to swell, and she needed operation to 7 the pressure the swelling was putting 8 her brain. The doctors 9part of her skull(头骨)to make room for the swelling. 10 the swelling went down(消退), her skull was placed back again.

    While the doctors predicted that she would never live a normal life, Vandna 11 improved. She was in a rehab center(康复中心)for about 3 months and began to realize how 12 her daily life might be. She had to wear a brace(支架)on her left leg to support her 13. Her left arm 14 lightly, and she often became tired. Though 15 on a campus wasn't easy, she finished high school and 16 a degree in speech therapy at University of Redlands.

    After the stroke, Vandna became 17 with the American Heart Association. She shared her 18 at public events and urged others to stay 19. She said if you 20 a tough time, remember tough times don't last, but tough people do.