A．pushesB．pullsC．makesD．seizes
A. pushes
B. pulls
C. makes
D. seizes
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A．backB．mouthC．bodyD．trunk
A. back
B. mouth
C. body
D. trunk
若将D=B* B-4*A*C改为D=A*A+B*B-C*C，则D的输出结果为 ______。
A. 0
B. 1
C. 2
D. 3
A．upB．inC．awayD．off
A. up
B. in
C. away
D. off
A．leavesB．foodC．grassD．water
A. leaves
B. food
C. grass
D. water
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