Thechiefengineersuggeststhatthesecondengineer()adeadlineforhandingintheworkplan.
A. willset
B. shallset
C. set
D. sets
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一般情况,通信铁塔设计使用年限为()年,结构安全等级为()级。
A. 50;一
B. 25;一
C. 50;二
D. 25;二
下列词形变化中,运用附加手段的是()。
A. pen-pens
B. Long-Longer
C. foot-feet
D. man-men
E. go-went
Icannottakeanyactionstoavoidclosequarterssituationwithyou,becauseyournavigationlights().
A. isnotvisible
B. arenotinvisible
C. arenotvisible
D. caneasilybeseen
(),themotionwouldcontinueindefinitelyonceithadstarted.
A. Weretherelossofenergybyfriction
B. Sincetherebelossofenergybyfriction
C. Weretherenolossofenergybyfriction
D. Shouldbenolossofenergybyfriction