相量表示法中,相量的长度表示正弦交流电的最大值或有效值。
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They made a new ______ to solve the problem, but failed again.
A. addition
B. attempt
C. platform
D. emphasis
It can be said that the adoption of shifting perspective is one of the ______ of Chinese painting.
A. characteristics
B. designs
C. imitations
D. feelings
His paintings often show some beautiful ______ of the trees in the lake.
A. restriction
B. function
C. reflection
D. observation
The Red Cross organized the ______ of food and clothing in the disaster area.
A. distribution
B. distributor
C. distribute
D. distributed