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【单选题】
Withaschoolrecordlikeyours,_______whyyoudidn’ttryforauniversityscholarship.A.I’m shocked##A.
With a school record like yours, _______ why you didn’t try for a university scholarship. A.I’m shocked
B.
I’m puzzled
C.
I’m amazed
D.
I feel pity
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【简答题】查表确定¢30P7孔的上下偏差:上偏差为 ,下偏差为 。(mm为单位) 查表确定¢30f7轴的上下偏差:上偏差为 ,下偏差为 。
【单选题】My pain _____ obvious the moment I entered the office，for the first man I met asked pitifully，“Are you feeling all right？”
A.
could be
B.
could have been
C.
must be
D.
must have been
【单选题】It was obvious that the team ______
A.
had met with Israeli objections
B.
had already proceeded to the mission
C.
had already been sent to the area
D.
would have to abandon their efforts
【单选题】My pain ______ obvious the moment I walked into the room, for the first man I met asked me pitifully, 'Are you feeling all right?'
A.
must be
B.
could be
C.
must have been
D.
could have been
【多选题】牛顿环干涉也是等厚干涉，为什么它的干涉条纹是不等间距的环形条纹而不是等间距的平行直线（ ）
A.
因空气厚度相等点的轨迹是环形
B.
因平凸透镜曲面上各点的斜率不等
C.
因各环对应的空气厚度不等
D.
因平凸透镜的折射率不同
【简答题】Φ50D7 的上偏差为 mm,下偏差为 mm。
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