【单选题】【消耗次数：1】
楼梯从安全和舒适的角度考虑，常用的坡度是()。
①
10°～20°
②
20°～25°
③
26°～35°
④
35°～45°
参考答案：
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相关题目
【单选题】
用某种排序方法对线性表（25，87，21，47，15，27，63，35，20）进行排序时，元素序列的变化情况如下：（1）25，87，21，47，15，27，63，35，20（2）20，15，21，25，47，27，63，35，87（3）15，20，21，25，35，27，47，63，87（4）15，20，21，25，27，35，47，63，87则采用的排序方法是___________排序长度为4。
①
交换排序法
②
选择排序法
③
插入排序
④
选择排序
【单选题】
已知四点A（10、20、30）、B（30、20、10）、C（10、20、10）、D（20、20、30），则对H面的重影点为______。
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
A与D，D点可见
②
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
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mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
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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;}
B与C，B点可见
③
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;}
A与C，A点可见
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;}
A与C，C点可见
【判断题】
<img src=https://huaweicloudobs.ahjxjy.cn/47C003A308772571ECC88633822B9D35.jpg title=20.jpg alt=20.jpg/>
①
正确
②
错误
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/325B794EF35F5FC3F402765D6EDAFEE2.png title=20.png alt=20.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/3A969FF63CBBE9002D24B6CCDF0740A7.png title=20-1.png alt=20-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/E358A610FFDA0E89E5EB81DE5F24EEC4.png title=20-2.png alt=20-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/E3D783691F1B96C9C68087371791B84E.png title=20-3.png alt=20-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/563FB1A8061CA86D502A854E46078693.png title=20-4.png alt=20-4.png/>
【单选题】
一组记录的关键字序列为（25，50，15，35，80，85，20，40，36，70），其中含有5个长度为2的有序表，按归并排序的方法对该序列进行一趟归并后的结果为（ ）。
①
A .(15,25,35,50,80,20,85,45,70,36)
②
B．(15,25,35,50,20,40,80,85,36,70)
③
C．(15,25,50,35,80,85,20,36,40,70)
④
D．(15,25,35,50,80,20,36,40,70,85)
随机题目
【单选题】
“I love you” is never a touch on lightly; its the signal ______ a romantic relationship is serious,or an indication of closeness between parents and children.
①
that
②
why
③
when
④
whether
【单选题】
“ Has he seen this film ? ” “Yes. He______ it several days ago.”
①
saw
②
has seen
③
had seen
④
was seeing
【单选题】
The thought flashed across my mind: “By some ?means or______ she has some information about my engagement. But how?”
①
other
②
others
③
the other
④
the others
【单选题】
You cant imagine what great trouble they have________the problem________.
①
to solve;being talked about
②
solving;discussing
③
to solve;to talk about
④
solving;being discussed
【单选题】
When I saw Mary , she _______on the piano.
①
is playing
②
plays
③
was playing
④
played
【单选题】
It may only be through repeated experiments _______ a baby will come to accept the idea _______ other people can have different views from what he or she has.
①
how;which
②
how;that
③
that;that
④
which;which
【单选题】
This technology has been ?around for a long time, but not until recent years _______ it in marketing.
①
businesses employed
②
did businesses employ
③
businesses had employed?
④
had businesses employed