-x=∣x∣
所以,x≦0
猜你喜欢
- 1My birthday is on the twenty-first of December同上(划线部分:on the twenty-first of Deceber)
- 2“相“多音字组词组词?
- 3He read very slowly just now.(改为一般疑问句)
- 4已知集合A={xl ax^2+5x+2=0},若A的子集至多有两个,求实数a的取值范围
- 5番茄属于蔬菜还是水果
- 6英语翻译
- 7初一英文作文 I don't like winter. 60字
- 8某电动机接在220V的电路中,线圈为三欧姆,通过的电流为3A
- 9When do you usually l____ school in the afternoon
- 109.2g某有机物物质的量为0.2mol在密闭的容器中燃烧后其产物为co2 co h2o