更多"[单选题] After trying several times, I"的相关试题:
[单选题] _____ several times, the young scientists still kept on making his experiments.
A. Having been failed
B. Having failed
C. Though failed
D. Because of failure
[单选题] Only after a year _____ to see the results of my experiment.
A. I began
B. I had begun
C. have I begun
D. did I begin
[单选题]We saw several natives advancing towards our party, and one of them came up to us, ________ we gave some bells and glasses.
A.to which
B.to whom
C.with whom
D.with which
[单选题] It took the experts several months to decide on the __( )_ for the new airport.
A. source
B. earth
C. site
D. character
[单选题]The heavy rain has lasted for several days and the river has____________ by 30 centimeters.
A.risen
B.raised
C.arisen
D.lifted
[单选题] My Captain is trying to ______ the pilot station before the ebb tide.
A. steam
B. proceed
C. approach
D. reach
[单选题] Information on the operating times and characteristics of foreign radio beacons can be found in which publication ________．
A.List of Lights
B.Coast Pilot
C.Sailing Directions
D.List of Radio beacons
[单选题]It was several minutes ______ we realized what was happening.
A.since
B.after
C.before
D.when
[单选题]He ______ turned down by several publishers before he finally got his first book ______.
A.had been; published
B.had; published
C.has been; to publish
D.was; to publish
[单选题] My brother is an actor. He _____ in several films so far.
A. appears
B. appeared
C. has appeared
D. is appearing
[单选题] The daily predictions of the times and heights of high and low water for a selection of Standard Ports are given in ______．
A.Admiralty Maritime Communications
B.Admiralty Tide Tables
C.a comprehensive guide for the yachtsman
D.ALRS
[单选题] Every vessel should at all times proceed at a safe speed．Safe speed is defined as that speed where ______．
A.You can stop within your visibility range
B.You can take proper and effective action to avoid collision
C.You are traveling slower than surrounding vessels
D.No wake comes from your vessel
[单选题]After dismantling and checking,
A.the ridge on the impeller needs to ground out
B.the ridge on the impeller wili ground out
C.we were grounding out the ridge on the impeller
D.we ground out the ridge on the impeller
[单选题]The fuel pipe is three times that one.
A.so long as
B.longer than
C.long as
D.long
[单选题] Every vessel shall at all times maintain a proper look-out ______.
A. by sight
B. by sight and hearing
C. by sight and hearing as well as by all available means appropriate to the prevailing circumstances
D. by sight and hearing as well as by all available means except smelling
[单选题] PAN-PAN repeated three times over the radiotelephone indicates which type of message will follow?
A. Distress
B. Safety
C. All clear
D. Urgency
[单选题] If an airplane circles a vessel 3 times，crosses the vessel's course close ahead while rocking the wings，and heads off in a certain direction，what does this indicate ________．
A.The plane is in distress and will have to ditch
B.The plane is going to drop a package and wishes the vessel to recover it
C.Someone is in distress in that direction and the vessel should follow and assist
D.There is danger ahead and the best course is indicated by the direction of the aircraft
