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【多选题】
政府采购的特点主要表现为A.
一般受年度预算的约束
B.
往往通过竞争性的招标采购等方式
C.
有时不是单纯的经济行为
D.
进入政府市场难度较大
E.
回报丰厚
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皮皮学刷刷变学霸
举一反三
【简答题】When and where were the memos published?
【单选题】—Such a stupid mistake could have been avoided. —Unfortunately, he______the mistake again and again.
A.
repeated
B.
would repeat
C.
had repeated
D.
would have repeated
【简答题】Where and when were workers’ compensation laws originated? When were they introduced in the United States? Were workers’ compensation laws in the United States issued nationally or by state?
【简答题】When and where were the two World Expositions held respectively in China?
【简答题】人工挖孔桩,长钢套管护壁 ,1~3根桩、条形桩基沿垂直轴线方向和群桩基础易的边桩 ,桩位的允许偏差()
【多选题】关于三面投影体系，正确的说明有（）
A.
在三面投影体系中，三个投影面是相互垂直的
B.
V投影面与W投影面之间的交线称为X轴线
C.
V投影面与H投影面之间的交线称为X轴线
D.
V投影面与W投影面之间的交线称为z轴线
E.
W面的投影图，称为正立投影图
【单选题】人工挖孔桩,长钢套管护壁 , 1~3 根桩、条形桩基沿垂直轴线方向和群桩基础中的边桩 ,桩位的允许偏差()
A.
± 20
B.
± 50
C.
± 75
D.
± 100
【单选题】---That must be a mistake. ---No, it ___ a mistake.
A.
must not be
B.
needn’t be
C.
cannot be
D.
may be not
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