【多选题】【消耗次数：1】
工程上常用的投影法有______ 和______这两种
①
平行投影法
②
斜投影法
③
中心投影法
④
正投影法
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相关题目
【单选题】
投影法的分类有 和平行投影法两种，其中平行投影法又可分为 和 两种。请选择以下选项的正确顺序：1、平行投影法 2、中心投影法 3、正投影 4、斜投影
①
1，2，3
②
3，4，2
③
1，3，4
④
2，3，4
【单选题】
正投影法是指：( )
①
投射线都相交于投射中心，投射出形体投影的方法
②
投射线互相平行且垂直于投影面，投射出形体投影的方法
③
由互相平行的投射线投射出形体投影的方法
④
投射线互相平行且倾斜于投影面，投射出形体投影的方法
【单选题】
正投影法是指：[填空]
①
投射线都相交于投射中心，投射出形体投影的方法
②
投射线互相平行且垂直于投影面，投射出形体投影的方法
③
由互相平行的投射线投射出形体投影的方法
④
投射线互相平行且倾斜于投影面，投射出形体投影的方法
随机题目
【单选题】
Was it until the1990s ____ the old man finally got a house of his own?
①
when
②
that
③
which
④
how
【单选题】
____ the math problem is difficult, Ill try very hard to work it out.
①
Though
②
When
③
Before
④
After
【单选题】
When you meet someone who ____ deeply about something, you probably will want to ask them why they do so.?
①
absorbs ?
②
cares ?
③
considers ?
④
minds?
【单选题】
Theory is based on practice and in____ serves practice.
①
turn
②
tone
③
tune
④
practice
【单选题】
When I got there, Henry ____ to the hospital.
①
had been sent
②
would send
③
was sent
④
would be sent
【单选题】
The engineers are going through with their highway project, ____the expenses have risen.
①
even though
②
just because
③
now that
④
as though
【单选题】
A police officer claimed he had attempted to ____ paying his fare.
①
avoid
②
reject
③
refuse
④
neglect
【单选题】
The students were not____ to leave the classroom without an adequate reason.?
①
permitted ?
②
remitted ?
③
admitted ?
④
emitted?
【单选题】
It was a minor illness, and she soon ____ it. ?
①
got over ?
②
got on with ?
③
got around ?
④
got out ?
【单选题】
Our English teacher demanded that we ____ to English broadcast every day.
①
listening
②
would listen
③
listen
④
could listen