The most powerful signal of stress is a change of pitch on the vowel.（）

The angle at the pole measured through 180°from the prime meridian to the meridian of a point is known as（）.

Through a （） pump, the liquid is transferred from the suction to the discharge by the mechanical variation of the volume of a chamber or chambers.

To equalize the power factor of two alternators operating in parallel, the （）

The depth of fuel oil in a tank is normally measured through the（）

The internal volume of a cargo hold measured from the inside faces of the cargo battens，the lower side of the deck beams，and the top of the tank top ceiling is known as the（）.

The uncertainty of an event is measured by its probability of occurrence and is inversely proportional to that. The more uncertain an event is. The more information is required to resolve uncertainty of that event. The amount of information is measured in （）

（）is a measure of the market value of all goods and services within the boundaries of a nation.

A power-driven fishing vessel is underway on the high seas and is not engaged in fishing. Which of the following factors determines what lights she will show?（）.

If the measures of the angles of a triangle are in the ratio of 3: 4: 5, what is the measure of the smallest angle of the triangle?

The （） is used to measure the volume of a liquid or gas through a pipeline within any given period of time.

●A (68) is a feature of the system or adescription of something the system is capable of doing in order to fulfill the system's purpose.