题干

下列句子中不是命题的是(   )

A:两直线平行,同位角相等

B:直线AB和直线CD不一定垂直

C:若|a|=|b|,则a2=b2

D:同角的补角相等

上一题 下一题 0.0难度 选择题 更新时间:2018-10-06 03:11:15

答案(点此获取答案解析)

B

同类题2

阅读下面短文,掌握其大意,然后从各题所给的四个选项(A、B、C、D)中选出最佳选项。

    Years ago when I volunteered at a homeless shelter, I talked with a boy, Albert. He said he liked my1 “Do you want to see mine?” he said, 2 his leg. He was barefoot. He said he'd been meaning to pick up a pair but hadn't gotten one. I felt a 3 feeling in my stomach.

    A few days later I was at home helping to 4 my daughter. I smiled when I 5 the socks over her feet. At that moment, Albert flashed in my 6.

    At noon, I went to a department store and 7 a shopping cart with socks — nothing 8, just white cotton men's socks.

    The next morning, I drove to the Palisades Park, which is a common overnight—destination for 9 individuals,

    I grabbed one of the 10 from my trunk and walked across the grass. It was dark out. It was a beautiful feeling to 11 before the sun and most living things.

    I headed fro a group of three men. Two were asleep and the third was digging through his shopping cart. It was loaded with plastic bottles and some clothes, and a few books — most 12, everything he owned in this world. As I walked toward him, he turned and 13 me, perhaps questioning my intention.

    “I thought you might 14 some new socks, ” I told him, handing him a pair. He looked 15 at first but took them, smiled and said, “Thank you.” I gave two more 16 for his partners.

    I 17. After 20 minutes, I returned for the second bag. An hour later, I 18 all the socks. Most people were sleeping, and I felt like a(n) 19 Santa Claus. I knew when they woke up they would find a very meaningful 20. That gave me an amazing feeling.