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【多选题】
预埋件钢筋形T接头外观质量检查结果，应符合下列规定（）A.
埋弧压力焊或埋弧螺柱焊时，四周焊包凸出钢筋表面的高度，当钢筋直径为18mm及以下时，不得小于3mm；当钢筋直径为20mm及以上时，不得小于4mm
B.
焊缝表面不得有气孔、夹渣和肉眼可见裂纹
C.
钢筋咬边深度不得超过0.5mm
D.
钢筋相对钢板的直角偏差不得大于2°
E.
焊条电弧焊时，角焊缝焊角尺寸（K）应符合当采用HPB300钢筋时，角焊缝焊角尺寸（K）不得小于钢筋直径的50%；当采用其它牌号钢筋时，角焊缝焊角尺寸（K）不得小于钢筋直径的60%
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举一反三
【单选题】A vector A has components A x = 12.0 m and A y = 5.00 m. What is the angle that vector A makes with the x - axis?
A.
12.6°
B.
22.6°
C.
32.6°
D.
67.4°
【简答题】根据涵洞出水口是否被下游水面淹没,可分为________和_________两类。
【单选题】The teacher asked her,"Does the sun rise in the east?" The teachet asked her ___ the sun ___ in the east.
A.
if; rise
B.
if; rises
C.
whether; rose
D.
whether did; rise
【简答题】客户对于故障诊断有什么期待？
【简答题】Vector A has a magnitude n times ______vector B.(fill in two words)
【单选题】A vector A has components A x = 12 m and A y = 5.0 m. What is the magnitude of vector A ?
A.
7.0 m
B.
13 m
C.
17 m
D.
60 m
【单选题】对于importjava.util.Vector，以下哪种说法是错误的?
A.
Vector类属于java.util包
B.
Vector类放在……/java/util/目录下
C.
Vector类放在java.util文件中
D.
Vector类是SUN公司的产品
【单选题】Which best defines the normal vector
A.
A vector that is perpendicular to the surface at a given point
B.
A vector that is parallel to the tangent plane at a given point
C.
A vector that lie in the tangent plane but perpendicular to the viewing direction
D.
A vector that is always perpendicular to the viewing direction
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