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【判断题】
一个算法可以被认为是用来解决一个计算问题的工具。A.
正确
B.
错误
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举一反三
【单选题】Which spoken emergency signal would you use to call a boat to come assist a man overboard?（）
A.
Distress signal
B.
Urgency signal
C.
Safety signal
D.
None of the above
【单选题】How should you signal the crane operator to use the main hoist?（）.
A.
Use one hand to give any miotion signal , and place the other hand motionless in front of the hand giving the motion signal
B.
Extend arm with the thumb pointing up , and flex the fingers in and out for as long as the load movement is desired
C.
First tap your elbow with one hand , and then proceed to use regular signals
D.
First tap the top of your head with your first , and then proceed to use regular signals
【单选题】The use of the danger signal（）.
A.
replaces directional signals
B.
makes the other vessel the stand-on vessel
C.
indicates doubt as to another vessels actions
D.
is the same as a MAYDAY signal
【单选题】光合作用中各种能量转化的顺序是
A.
光能→电能→稳定的化学能→活跃的化学能
B.
光能→化学能→电能
C.
光能→电能→活跃的化学能→稳定的化学能
D.
光能→化学能→电能→化学能
【单选题】光合作用中各种能量转化的顺序是（）。
A.
光能-电能-稳定的化学能-活跃的化学能
B.
光年-化学能-电能
C.
光能-电能-活跃的化学能-稳定的化学能
D.
光能-化学能-电能-化学能
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