Getting into the maritime workforce can be done in two ways – either through the naval services of the respective country or through merchant marine services. But while both are marine services, the differences between them are many and need to be clarified in order to decide a career path...
We are enjoying the convenience (便利)of modern technology.( ) A. How B. What C. What a D. How a答案根据"...rapid progress our country is making in science and technology!"可知,本句的中心词是不可数名词progress,用"What+形容词+不可数名词+主语+谓语!"结构。故选:B。