【判断题】【消耗次数：1】
一般螺线的主法线与一个固定方向垂直
①
正确
②
错误
参考答案：
复制
纠错
相关题目
【单选题】
80、在一般情况下，斜井井筒应布置在煤层(组)下部稳定的底板岩层中，距煤层的法线距离一般不小于（ ）m，井筒方向与煤层倾向基本一致。
①
15~20
②
20~30
③
30~40
随机题目
【单选题】
While _______ the sun, the satellite has sent more than four billion bits of information back to earth.
①
having orbited
②
being orbited
③
having been orbited
④
orbiting
【单选题】
Theyareconsidering______beforethepricesgoup.
①
of buying the house
②
with buying the house
③
buying the house
④
to buy the house
【单选题】
Having no money but _______ to know, he simply said he would go without dinner.
①
not to want anyone
②
not wanting anyone
③
wanted no one
④
to want no one
【单选题】
______suchagoodchance,heplannedtolearnmore.
①
To be given
②
Having been given
③
Having given
④
Giving
【单选题】
I appreciate_______ to your home.
①
to be invited
②
to have invited
③
having invited
④
being invited
【单选题】
Silveristhebestconductorofelectricity,copper_______itclosely.
①
followed
②
following
③
to follow
④
being followed
【单选题】
_____withthesizeofthewholeearth,thehighestmountaindoesnotseemhighatall.
①
When compared
②
Compare
③
While comparing
④
Comparing
【单选题】
We hadnt met for 20 years, but I recognized her ______I saw her.
①
for the moment
②
the moment when
③
at the moment when
④
the moment
【单选题】
______ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
①
Even if
②
As far as
③
If only
④
So long as
【单选题】
Therewasateapotfashionedlikeachinaduck,outof______openmouththeteawassupposedtocome.
①
which
②
its
③
that
④
whose