【简答题】布线时,线拐弯处的拐角应成圆形或圆弧形,以免在高频电路中造成 ( ) 和 ( ) 。
【简答题】How does he want the tickets?A. O ne single
and one return B. Two returns C. One single D. Two singles .
【单选题】How does he want the tickets
【简答题】Listen and write.(听句子,写数字) 1. 2. 3. 4. ______ ______ ______ ______