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【单选题】
可用来标定NaOH滴定液的基准物是
A.
无水碳酸钠
B.
邻苯二甲酸氢钾
C.
草酸钠
D.
硼砂
E.
甲酸
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【简答题】阅读理解。 A strange woman comes to my door one day in early March. In this area we often have people selling things door-to-door, but she doesn't look like a professional saleswoman. She just smiles and g...
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【单选题】If we say a “dog” is an animal with four legs and a tail, often kept as a pet or trained for work, this is its
A.
denotative meaning
B.
connotative meaning
C.
implied meaning
D.
extended meaning
【单选题】An animal raised by another species will often show affection for a member of _________ species when it grows up.
A.
that
B.
those
C.
this
D.
these
【单选题】According to this passage,
A.
man is the cause of some animal extinction.
B.
animals often bring about their own extinction.
C.
Congress can absolutely end extinction of animals.
D.
a law is more important than human responsibility.
【多选题】【请选出两项正确答案】某单筋矩形截面梁b×h = 250mm×500mm,梁内配置3根直径为18mm的HPB300钢筋(主力作用下容许应力160MPa),混凝土用C30(弯曲受压容许应力10.0MPa),纵向受力筋保护层厚度为30mm。在主力作用下截面弯矩M=40kN.m。应用容许应力法,按普通梁取n=10,在进行截面校核时,核算其截面钢筋应力值所处区间为( )MPa。
A.
115-125
B.
120-130
C.
125-135
D.
130-140
【简答题】学而不厌,诲人不倦。 学如逆水行舟,不进则退。 有朋自远方来,不亦乐乎。 温故而知新 ■ 不忘初心,牢记使命 ■ 不忘初心,方得始终 ■ 初心不改、矢志不渝 ■ 登高望远,居安思危 ■ 军委管总、战区主战、军种主建 ■ 政治意识、大局意识、核心意识、看齐意识 ■ 照镜子、正衣冠、洗洗澡、治治病 ■ 打虎、拍蝇、猎狐 ■ 党的创造力、凝聚力和战斗力 ■ 发展不平衡、不充分 ■ 社会文明水平 ■ 从站...
【单选题】矩形截面钢筋混凝土梁的纵向受力钢筋应在()布置
A.
截面上部
B.
截面下部
C.
截面受压区
D.
截面受拉区
【简答题】某公司与国外客户洽谈一笔土特产品出口业务,双方以CIF条件成交,确定了具体的价格和双方的责任。由于该货物销售季节性很强,故买方在签约时坚持要求在合同中写明:卖方必须保证货物于5月底前到达目的港,否则买方有权撤销合同并要求赔偿。请问:买方的要求是否合理?为什么?
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