Packaging can’t be used to inform customers about the product’s contents, uses, advantages, features.
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The advantages of motor transport are flexibility of both location and time and speed of delivery.
A. 对
B. 错
外啮合齿轮泵中啮合线把密封容积分隔成两部分,轮齿进入啮合侧描述正确的是( )。
A. 密封容积由小变大
B. 密封容积由大变小
C. 吸油
D. 压油
液力变矩器由( )组成。
A. 外壳
B. 泵轮
C. 涡轮
D. 导轮
以下程序的运行结果是 int f(int x) {int y; if(x==0||x==1) return (3); y=x*x-f(x-2); return y; } main() {int z; z=f(3); printf("%d\n",z); }