【单选题】What is implied about Newman's juggling of school and play?
A.
He studies hard and spends more time on it than on play.
B.
He spends more time running companies than studying.
C.
He has no time playing because of school and work.
D.
He never minds how much time he spends on study.
【单选题】Tony's sister spends five hours ______ the piano every day. [ ]
【单选题】航空器上使用的铝合金板材通常是什么类型的材料?
【单选题】The Dreamer type never spends long hours in front of a desk.
【简答题】黑白图像或灰度图像只有1个位平面,彩色图像有个或更多的位平面。
【简答题】铸造铝合金包括 、 、 和 等系列合金。