未知题型 牙型、大径和螺距三要素都符合标准的螺纹称为标准螺纹。

单项选择题 电路中，所有其他电子元件的输入端和输出端分别被连接在一起。这种电路是（）

未知题型 The major difference between the following two translations is not so much in what is expressed as in how the message is expressed. ST: Some fishing boats were becalmed just in front of us. Their shadows slept, or almost slept, upon the water, a gentle quivering alone showing that it was not complete sleep, or if sleep, that it was sleep with dreams. TT1: 眼前不远，渔舟三五，凝滞不前，樯影斜映水上，仿佛睡去，偶尔微见颤动，似又未尝熟睡，恍然惊梦。 TT2: 眼前有几艘小渔船停着不动，船影似乎睡着了，或者说几乎睡着了，水面传来轻微的晃动，告诉我们小河并没有完全睡着，即使睡着了，也是似梦非梦。