Jane：Tom , a boy is in the classroom (教室) . Can you guess who he is?

Tom：OK. A boy? ____

Jane：Yes , he is very tall.

Tom：Does he have blond hair?

Jane：No, ____

Tom：Black hair? ____ 

Jane：That's right. He has a wide mouth.

Tom：____

Jane：Yes , he has big eyes and a big nose.

Tom： ____

Jane：Yes, you're right.

白炽灯的灯丝由钨丝 制成，当灯丝烧断后脱落一段，又将剩余灯丝刚好能搭接上使用，若灯泡功率原来为60 W，观察搭接起来的灯丝长度大约为原来的，则现在灯泡的功率约为(　　)

短周期主族元素X、Y、Z、W的原子序数依次增大，X在元素周期表中原子半径最小，Y原子在周期表中处于族序数等于周期序数2倍的位置，Z最外层电子数是其核外电子数的3/4，W与Z属于同一主族．下列叙述正确的是（　　）

Either you or I ______ going there tomorrow．