WATER SPORTS
Recreational diving or sport diving is a type of diving that uses scuba equipment for the purpose of leisure and enjoyment. In some diving circles, the term "recreational diving" is used in contradistinction to "technical diving", a more demanding aspect of the sport which requires greater levels of training, experience and equipment.
Recreational scuba diving grew out of related activities such as snorkeling and underwater hunting. For a long time, recreational underwater excursions were limited by the amount of breath that could be held. However, the invention of the aqualung in 1943 by Jacques-Yves Cousteau and its development over subsequent years led to a revolution in recreational diving. However, for much of the 1950s and early1960s, recreational scuba diving was a sport limited to those who were able to afford or make their own kit, and prepared to undergo intensive training to use it. As the sport became more popular, manufacturers became aware of the potential market, and equipment began to appear that was easy to use, affordable and reliable. Continued advances in' SCUBA technology, such as buoyancy compensators, modern diving regulators, wet or dry suits, and dive computers, increased the safety, comfort and convenience of the gear encouraging more people to train and use it.
Until the early 1950s, navies and other organizations performing professional diving were the only providers of diver training, but only for their own personnel and only using their own types of equipment. There were no training courses available to civilians who bought the first scuba equipment. Professional instruction started in 1959 when the non-profit National Association of Underwater Instructors was formed.
Further developments in technology have reduced the cost of training and diving. Scuba-diving has become a popular leisure activity, and many diving locations have some form of dive shop presence that can offer air fills, equipment and training. In tropical and sub-tropical parts of the world, there is a large market in holiday divers, who train and dive while on holiday, but rarely dive close to home. Generally, recreational diving depths are limited to a maximum of between 30 and 40 meters (100 and 130 feet), beyond which a variety of safety issues make it unsafe to dive using recreation diving equipment and practices, and specialized training and equipment for technical diving are needed.
These following sentences are true EXCEPT ________.
A. In the early 1950s anyone who wanted to dive could be professionally trained.
B. In the early 1950s there were no training courses available to civilians who bought the first scuba equipment.
C. As recreational diving became more popular, manufacturers have made more and more diving equipment.
D. Advances in scuba technology encourage more and more people to train and use it.
Đáp án A
Tất cả những câu dưới đây đều đúng ngoại trừ _______.
A. Trong những năm 1950 bất cứ ai muốn lặn đều có thể được đào tạo chuyên nghiệp.
B. Trong những năm 1950 không có khóa đào tạo nào có sẵn cho những người người đã mua những thiết bị lặn đời đầu.
C. Khi hoạt động lặn giải trí dần trở lên phổ biến hơn, các nhà sản xuất đã tạo ra nhiều thiết bị lặn hơn.
D. Những tiến bộ trong công nghệ lặn đã khuyến khích ngày càng nhiều người tập luyện và tham gia vào môn thể thao này.
Theo thông tin của đoạn văn số 3:
Until the early 19505, navies and other organizations performing professional diving were the only providers of diver training, but only for their own personnel and only using their own types of equipment. There were no training courses available to civilians who bought the first scuba equipment. (Cho tới đầu những năm 1950. Quân đội và những tổ chức huấn luyện lặn là những đơn vị duy nhất cung cấp chương trình đào tạo này, nhưng chỉ dành cho nhân viên của họ và chỉ sử dụng thiết bị chuyên dụng của họ. Không có bất cứ khóa huấn luyện nào cho dân thường người mà đã mua những thiết bị lặn đầu tiên.)