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

<dl id="sptpl"></dl><pre id="sptpl"><acronym id="sptpl"></acronym></pre>

<dl id="sptpl"></dl>

<abbr id="sptpl"><output id="sptpl"><b id="sptpl"></b></output></abbr>

<dd id="sptpl"></dd>

單項選擇題

It is dangerous for vessels without the use of radar（）the estuary.

A.to get
B.to approach
C.to proceed
D.to close

你可能感興趣的試題

單項選擇題

Induced magnetism is found in（）.

A.hard iron
B.soft iron
C.vertical iron only
D.horizontal iron only

單項選擇題

If several fixed navigational lights are visible at the same time，each one may be positively identified by checking all of the following EXCEPT what against the Light List?（）

A.Rhythm
B.Period
C.Intensity
D.Color