【单选题】【消耗次数：1】
乙醇作为片剂的润湿剂一般浓度为（ ）。
①
30％～70％
②
1％～10％
③
10％～20％
④
75％～95％
参考答案：
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相关题目
【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
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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 */
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mso-fareast-font-family:等线;
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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
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{mso-style-name:普通表格;
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mso-style-parent:"";
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mso-para-margin-bottom:.0001pt;
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mso-hansi-theme-font:minor-latin;
mso-font-kerning:1.0pt;}
A与C，C点可见
【单选题】
A点坐标为（10、20、30），B点坐标为（30、20、30）则AB距离为______。
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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mso-hansi-theme-font:minor-latin;
mso-font-kerning:1.0pt;}
正垂线
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;
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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;}
侧垂线
③
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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mso-bidi-font-size:11.0pt;
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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
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;
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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;
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mso-hansi-theme-font:minor-latin;
mso-font-kerning:1.0pt;}
铅垂线
【单选题】
设一个关系模式为R(A,B,C)，对应的关系内容为R={{1,10,50}, {2,10,60}, {3,20,72}, {4,30,60}}，则ПB(δC70(R))的运算结果中具有的元组个数为（ ）。
①
4
②
3
③
2
④
1
【单选题】
已知三点A（10、20、15）、B（10、0、30）、C（0、10、0），则在坐标面上的点为______。
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;
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A、B、C三点
②
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
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mso-hansi-theme-font:minor-latin;
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B点
③
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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B、C两点
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;
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mso-bidi-font-size:11.0pt;
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C点
【单选题】
G02X20Y20R-10F100；所加工的一般是（）。
①
整圆
②
夹角180°的顺时针圆弧
③
180o〈夹角〈360°的逆时针圆弧
④
180o〈夹角〈360°的顺时针圆弧
【单选题】
设物理地址(10FF0H)=10H,(10FF1H)=20H，(10FF2H)=30H，从地址10FF1H中取出一个字的内容是
①
1020H
②
3020H
③
2030H
④
2010H
随机题目
【单选题】
下列各组判断中，不正确的是
①
CH4，CO2，BCl3非极性分子
②
CHCl3，HCl，H2S极性分子
③
CH4，CO2，BCl3，H2S非极性分子
④
CHCl3，HCl极性分子
【单选题】
已知 <img src="https://file.icve.com.cn/doc_public4/348/428/5706B0CEC785A1D28890DE635497BDA2.jpg" title="1.jpg" alt="1.jpg"/> 则反应<img src="https://file.icve.com.cn/doc_public4/303/967/4BFF1ED4099758C0161D7C1E0071BFD7.jpg" title="1.jpg" alt="1.jpg"/>在标准态下自发进行的方向是（ A ）
①
不反应
②
正向
③
逆向
④
不能判断