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

<track id="c21wj"><strong id="c21wj"><form id="c21wj"></form></strong></track>

單項(xiàng)選擇題

All the crew must know the locations as well as the （）of the life-saving and fire-fighting appliances.

A.operate
B.operating
C.operations
D.operated

你可能感興趣的試題

單項(xiàng)選擇題

What kind of （）can be used for gas and chemical fires?

A.equipment
B.apparatus
C.extinguishers
D.machines

單項(xiàng)選擇題

Fires can be divided into different （）.

A.kind
B.kinds
C.types
D.B+C

<ins id="ajhbf"></ins>

<option id="ajhbf"><i id="ajhbf"></i></option>