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【简答题】
No one knows where the phrase “Indian summer” came from, or how it got started: We are sure that the phrase was well known by the year 1778, because Crevecoeur, the French writer, wrote about it. Crevecoeur, who became an American citizen, said this: “A severe frost follows the autumn rains. This prepares the ground to receive the snows of winter. But before the snows come, the earth turns warm once again and there are a few days of smoke and mildness called Indian summer.” There is a story about Indian summer that goes back to the very first settlers of the New World. The Indians, seeing the settlers preparing for winter, told them not to hurry. The weather would turn warm again, mild breezes would blow and the sky turns soft and smoky. And so it did. The sun became hot, and a bright warm haze flowed over the fields and woods. The settlers, remembering the words of the Indians, called this wonderful period Indian summer. But the Indians have their own stories about this late period of warm weather. One of their stories is about a great god called Nanahbozhoo. Nanahbozhoo lived at the North Pole. He always fell asleep when winter set in. But before doing so, he lit his great pipe and smoked tobacco for many days. The smoke rising from his pipe flowed down over the earth and produced the beautiful Indian summer. It was the smoke that made the land look hazy, warm and enjoyable. Decide whether each of the following statements is True (T) or False (F).
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举一反三
【多选题】下列方程组属于描述时序电路所用的方程组的是( )。
A.
输出方程组
B.
输入方程组
C.
驱动方程组
D.
状态方程组
【简答题】患有以下疾病的人员不得颁发导游证()。 A糖尿病 B高血压 C伤寒 D病毒性肝炎 E非典型肺炎
【简答题】患有以下疾病的人员不得颁发导游证( )。
【单选题】卡托普利的降压作用是
A.
拮抗钙通道
B.
利尿降压
C.
直接扩张血管
D.
抑制RAAS系统
E.
阻断β受体
【判断题】描述同步时序电路的方程组有激励方程组、转换方程组和输出方程组,而描述异步时序电路的方程组除了以上三类之外,还多了一类时钟信号方程组,不过异步时序电路的这三类方程组与同步时序电路的这三类方程组相同。这个说法正确吗?
A.
正确
B.
错误
【判断题】接收与存储用户程序和数据的工作是由PLC的存储器完成的。
A.
正确
B.
错误
【单选题】下列方程组不属于描述时序电路所用的方程组的是( ):
A.
输出方程组
B.
输入方程组
C.
状态方程组
D.
驱动方程组
【多选题】时序电路的方程组有
A.
输出方程组
B.
驱动方程组
C.
激励方程组
D.
状态方程组
【多选题】在下列各职务中属于中层管理者的有:( )。
A.
公司的部门经理
B.
学校的系主任
C.
医院里的院长
D.
工厂的车间主任
【单选题】选择调查课题最主要的意义在于,它解决了整个调查活动的基本( )问题。
A.
质量
B.
方向
C.
水平
D.
过程
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