一次函数y=kx+b的图象（如图），当x＜0时，y的取值范围是_刷题宝

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一次函数y=kx+b的图象（如图），当x＜0时，y的取值范围是（）

A：y＞0

B：y＜0

C：y＜2

D：2＜y＜0

上一题下一题 0.0难度选择题更新时间:2018-01-10 09:42:14

答案(点此获取答案解析）

C

同类题1

美国科学家宣布发现了铝的“超级原子”结构﹣﹣Al₁₃和Al₁₄，已知这类“超级原子”最外层电子数之和为40个时处于相对稳定状态，下列说法中，正确的是（　　）

同类题2

The following are some advertisements(广告). Read them and answer the questions.

No. 1 A big house with a big yard for a big family. There are four bedrooms, three bathrooms, a big living room and a great kitchen.
The house costs $2,000 a month. Call Mrs. Morris at 4560987.

No. 2 Great location! A nice new flat building with a swimming pool. There is a big living room, a bedroom, a bathroom and a nice kitchen.
It is $1,200 a month. The phone number is 7610201. You can ask Dana for help.

No. 3 There is a town house for you. The first floor is for playing games, and the second floor is for living. On the second floor, there is a living room, two bedrooms, two bathrooms and a nice big kitchen. There is also a great yard behind the house for children.
It is $1,7000 a month. Please call Nathan at 4645 2436.

No. 4 Here is your new home! It is a big flat with three bedrooms, a living room, a dining room and a bathroom. The flat has a good parking place(停车位) but no yard.
It is $1,600 a month. Call Wilson at 533 0202.

同类题3

有下列叙述：

① 在空间直角坐标系中，在ox轴上的点的坐标一定是（0，b，c）；

②在空间直角坐标系中，在yoz平面上的点的坐标一定是（0，b，c）；

③在空间直角坐标系中，在oz轴上的点的坐标可记作（0，0，c）；

④在空间直角坐标系中，在xoz平面上的点的坐标是（a，0，c）。

其中正确的个数是（）

同类题4

下列有关基因对性状的控制的说法不正确的是（）

同类题5

下列反应的离子方程式正确的是
①将0.1mol/L盐酸数滴缓缓滴入25mL 0.1mol/LNa₂CO₃溶液中，并不断搅拌：
2H⁺+CO₃²^－

CO₂↑+H₂O
②铜片跟稀硝酸反应：Cu+NO₃^—+4H⁺ Cu²⁺+NO↑+2H₂O
③苯酚钠溶液中通入少量CO₂：2C₆H₅O^－+CO₂+H₂O→2C₆H₅OH+CO₃²^－
④0.1molFeBr₂中滴入含Cl₂0.1mol的氯水：2Fe²⁺+2Br^－+2Cl₂＝2Fe³⁺+Br₂+4Cl^－

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