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【单选题】
It's seven thirty.  I_________ go to school. [     ]
A.
have got
B.
have got to
C.
got to
D.
had got to
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举一反三
【简答题】A.at most B.at last C.at least D.at first
【简答题】A) at least B) at most C) at first D) at last
【简答题】厚度为 2毫米的镀银精炼铜板,规格为100X100毫米
【简答题】A.at least B.at most C.at last D.at first
【简答题】厚度为2毫米的镀银精炼铜板,规格为100X100毫米
【判断题】为了稳定输出电流,应该引入电流负反馈。
A.
正确
B.
错误
【判断题】放大电路中,为了稳定输出电流,应该引入并联电压负反馈。
A.
正确
B.
错误
【单选题】【C15】
A.
at last
B.
at most
C.
at all
D.
at first
【判断题】M30指令表示程序结束:刀具停止进给,冷却液关闭,但主轴仍然转动。
A.
正确
B.
错误
【简答题】Last summer, Mark became a middle school student. He took an English test in the first month. Mark was a good student and he worked hard. He finished the questions easily until he read the last one: “...