营运驾驶员从业资格证遗失的,在有关新闻媒体公告作废()日后,向原发证机关申领新证。
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销座孔中心线与活塞中心线的垂直性不符合要求时,柴油机将产生活塞和汽缸套的()现象。
A. 滚动摩擦
B. 偏磨
C. 均匀磨损
D. 拉伤
“提高警惕,保卫祖国”是我国哪一位领导人给公安部队首届功臣模范代表会议的题词?()
A. 毛泽东
B. 周恩来
C. 朱德
苯甲酸钠必须转变成()后才有抑菌作用,常用作防腐剂是因为它在水中溶解度()的原因。
Beads, stones, seashells, paper, precious metals such as gold and silver, base metals such as iron have all been used as money. Today, money is printed on paper. A lot of countries use their own currency, with n ames such as dollar, pound, franc, ruble, yuan and so on. Since 2002, 18 of the EU members have replaced their national currencies by Euro notes and coins. If you want to pay for something in another currency, you have to change your money into the other money. If you want to travel outside your native country, you need to change your own country's money for the money of the country you are visiting. Most large banks sell foreign currencies. You can exchange money at a bank or at an office of a tourist agency Wherever you go, exchanging money puts you in touch with international finance, which is concerned with exchange rates between different currencies. Deciding the rate for the international exchange of money is one of the most complex aspects of international banking. Foreign exchange rates have significant impact on the economy of a country.
A. 正确
B. 错误