[填空题]

This practice book is intended for foreign engineers or students of engineering who have already mastered the elements of English, and who now want to use their knowledge of the language to read books on their own subjects. Readers should understand, however, that the purpose of the book is to teach language, not to teach engineering.
The language in which scientific and technical facts are expressed is certainly not a different language from that of everyday life, but all the same it presents the foreign student with a number of special problems. The most obvious and the most widely recognized of these problems is the vocabulary. One of the aims of this practice book is to present as many technical words as possible, and as often as possible : words such as work and pain and load and feed and force. Words like these look harmless, but they can cause a lot of trouble to the student.
But more than anything else, I have tried to describe the technical statement; tha

[填空题]

This practice book is intended for foreign engineers or students of engineering who have already mastered the elements of English, and who now want to use their knowledge of the language to read books on their own subjects. Readers should understand, however, that the purpose of the book is to teach language, not to teach engineering.
The language in which scientific and technical facts are expressed is certainly not a different language from that of everyday life, but all the same it presents the foreign student with a number of special problems. The most obvious and the most widely recognized of these problems is the vocabulary. One of the aims of this practice book is to present as many technical words as possible, and as often as possible : words such as work and pain and load and feed and force. Words like these look harmless, but they can cause a lot of trouble to the student.
But more than anything else, I have tried to describe the technical statement; tha

[单项选择]The practice of exchanging foreign currency can vary by country. In one country, you may have to change your money at the airport, and in other countries you may need to buy your foreign currency in advance. Here are some places you can exchange foreign currency for U.S. currency. Your Bank In many cases you can purchase U.S. currency for your trip from a bank. Banks tend to have higher exchange rates than some currency exchange businesses. Before you purchase currency from a bank, check the currency change rates for that day so you can compare the rate the bank is giving and determine if it’s a good offer. There is a fee involved in withdrawing foreign currency from your bank. The Airport Currency exchange businesses can be found at most international airports, so you can purchase U.S. currency either before you board your flight or at the U.S. airport on arrival. Note that U.S. airports typically have fewer currency exchange counters than travelers are accustomed to seeing in
A. changes with time of the year
B. depends on exchange rates of the day
C. is exactly the same all over the world
D. is likely to differ from country to country