●In C language，the usual expression statements are (73) or function calls.

●In C language，the usual expression statements are (73) or function calls.

When latitude and longitude are used，these shall be expressed in（）（and decimals of a minute if necessary），north or south of the Equator and east or west of Greenwich.

Texts are usually used in English classes for two main purposes: as a way of developing reading comprehension and as a way of learning new language.（）

In English, “pill” and “bill” are （）.

Camshafts are usually driven by timing gears or （）.

（） is not usually used in liquid cargo systems.

In towing，chocks are used to（）.

The （） is used for hauling in or letting out the wires or ropes.

What do we mean by a perfect English pronunciation? In one (11) there are as many different kinds of English as there are speakers of it. No two speakers speak in exactly the same (12) We can always hear different forms between them, and the pronunciation of English (13) a great deal in different geographical areas. How do we decide What sort of English to use as a model? This is not a question that can be (14) in the same way for all foreign learners of English. (15) you live in a part of the world like India or West Africa, where there is a long tradition of speaking English for general communication purposes, you should (16) to acquire a good variety of the pronunciation of this area. It would be a fashion in these circumstances to use as a model BBC English or anything of the sort. On the other hand, if you live in a country (17) there is no traditional use of English. You must take as your model some form. of (18) English pronunciation. It does not (19) very much which form. you choose. The most (20) way is to take as your model the sort of English you Can hear most often.

In an English class we are usually concerned with casual listening.（）

Compensated flow control or constant flow valves are used in hydraulic systems to（）