單項(xiàng)選擇題

Records of garbage disposal are required to be maintained （）.

A.until each quadrennial PSC inspection
B.until the end of each voyage
C.for a minimum of one year
D.for a minimum of two years

你可能感興趣的試題

單項(xiàng)選擇題

The use of sinking and dispersing agents for the removal of surface oil is （）.

A.the most common method used in the United States
B.too expensive for common use
C.generally safe to sea life
D.generally harmful to sea life

單項(xiàng)選擇題

One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space is （）.

A.the "snow" which is sometimes discharged along with the gas is toxic
B.prolonged exposure to high concentrations of C0₂gas causes suffocation
C.rapid dissipation of the C0₂ vapor
D.the C0₂ gas is lighter than air and a large amount is required to extinguisha fire near the deck