电机车的直流串激牵引电动机的转矩随运输线路的条件变化可以()调节。
A、自动
B、手动
C、电动
参考答案:A
A good modern newspaper is an extraordinary piece of reading. It is remarkable first for what it contains the range of news from local crime to international politics, from sports to business to fashion to science, and the range of comment and special features (特定) as well, from editorial page to feature articles and interviews to criticism of books, art, theatre and music. A newspaper is even more remarkable for the way one reads it never completely, never straight through, but always by jumping from here to there, in and out glancing at one piece, reading another article all the way through, reading just a few paragraphs of the next. A good modern newspaper offers a variety to attract many different readers, but far more than any one reader is interested in. What brings this variety together in one place is its topicality (时事性), its immediate relation to what is happening in your world and your locality now. But immediacy and the speed of production that goes with it mean also that much of what appears in a newspaper has no more than transient (短暂的) value. For all these reasons, no two people really read the same paper: what each person does is to put together out of the pages of that day’s paper, his own selection and sequence, his own news paper. For all these reasons, reading newspapers efficiently, which means getting what you want from them without missing things you need but without wasting time, demands skill and self-awareness as you modify and apply the techniques of reading.
It can be conclude from the passage that newspaper readers ______.
A. apply reading techniques skillfully B. jump from one newspaper to anotherC. appreciate the variety of a newspaper D. usually read a newspaper selectively
在金属活动顺序表中,下面说法不正确是()。
A.越靠后的金属离子越易失去电子被氧化
B.越靠后的金属离子越易得到电子被还原
C.越靠前的金属离子越易失去电子被氧化
D.越靠前的金属离子越易得到电子被还原