99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項選擇題

A hygrometer is a device used for determining（）.

A.the absolute temperature
B.atmospheric pressure
C.wind velocity
D.relative humidity

你可能感興趣的試題

單項選擇題

A large oil fire on the deck of a ship can be fought most effectively with（）.

A.dry chemical
B.foam
C.high-velocity fog
D.water

單項選擇題

A life line must be conncted to the life raft（）.

A.at the bow
B.at the stern
C.in the middle
D.all around

<blockquote id="lchkq"></blockquote>