【单选题】【消耗次数：1】
下列说法错误的是（ ）
①
当k =0时，此时直线平行于x轴或与x轴重合
②
若直线的倾斜角为90°，则直线与y轴垂直
③
当k 0时，直线从左到右是上升的
参考答案：
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纠错
相关题目
【单选题】
直线AB的正面投影与OX轴倾斜，水平投影与OX轴平行，则直线AB是( )
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:普通表格;
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-priority:99;
mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin:0cm;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.5pt;
mso-bidi-font-size:11.0pt;
font-family:等线;
mso-ascii-font-family:等线;
mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:等线;
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:等线;
mso-hansi-theme-font:minor-latin;
mso-font-kerning:1.0pt;}
水平线
②
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:普通表格;
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-priority:99;
mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin:0cm;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.5pt;
mso-bidi-font-size:11.0pt;
font-family:等线;
mso-ascii-font-family:等线;
mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:等线;
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:等线;
mso-hansi-theme-font:minor-latin;
mso-font-kerning:1.0pt;}
正平线
③
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
侧垂线
④
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:普通表格;
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-priority:99;
mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin:0cm;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.5pt;
mso-bidi-font-size:11.0pt;
font-family:等线;
mso-ascii-font-family:等线;
mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:等线;
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:等线;
mso-hansi-theme-font:minor-latin;
mso-font-kerning:1.0pt;}
一般位置线
【单选题】
凡与三个坐标轴平行时的直线尺寸，可在轴测轴上等同量取，与坐标轴平行的直线不能再图上直接量取尺寸，而要先定出该直线的两端点的位置，再画出该直线的轴测投影。
①
正确
②
错误
【单选题】
若不论k为何值，直线y＝k(x－2)＋b与曲线x2－y2＝1总有公共点，则b的取值范围是( )
①
<img src=http://huaweicloudobs.ahjxjy.cn/e9998fb00fcc2b880776111bdad91542.png/>
②
<img src=http://huaweicloudobs.ahjxjy.cn/a51d72636c67d473a46bb83426ef1b3b.png/>
③
<img src=http://huaweicloudobs.ahjxjy.cn/04eb16dfe72d8c30c01a84f79440f0e6.png/>
④
<img src=http://huaweicloudobs.ahjxjy.cn/97b5a58bc1f58ba5d2c45562faed49aa.png/>
【单选题】
直线的起点为（10、10），如果要画出与 X 轴正方向成 60 度夹角，长度为 100 的直线段 应输入（）。
①
@100 60
②
@100，60
③
100 60
④
50，86.6
随机题目
【单选题】
______ for over 30years, we have great confidence in offering customers with premium products and services.
①
Being in the line
②
We will be in the line
③
To be in the line
④
Having been in the line
【单选题】
As these machines are precision instruments which cannot stand rough handling, the wording” Handle with Care” should be also marked ____ each case.
①
on
②
in
③
with
④
into
【单选题】
Should your products prove _________ in quality and reasonable in price, I trust substantial order will follow .
①
satisfy
②
satisfactory
③
satisfied
④
satisfaction
【单选题】
Considering your first transaction with us, we would like to ask you to offer name and address of your bank so as to enable us to ______ references.
①
apply with
②
account for
③
apply for
④
account on
【单选题】
As we are one of the leading importers in this line, we are ____ to handle large quantities.
①
at a position
②
in a position
③
on a position
④
of a position
【单选题】
We shall be pleased to receive from you all necessary information _________ these goods.
①
regarding
②
in regard
③
as regard
④
with regard