题目内容

The job market for college graduates is improving (slow)______, according to a recent report.

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The company has created 3D printed parts that are (strong) ______ than ever before.

(Fortunate)________, they obtained a small business loan from a local bank.

架空线路的零序电抗一般来说比正序电抗大3-5倍。（）

A. 对
B. 错

只有在中性线星形接地系统中才有零序电流流过，因为零序电流必须以中性线作为通路。（）

A. 对
B. 错