中小学德育的内容包括哪些方面
参考答案:确立班集体的奋斗目标; (2) 选样和培养班干部; (3) 培养正确的集体舆论和优良的班风; (4) 组织多样的教育活动。
—Your sweater looks nice. Is it _____ wool?
—Yes, it is.[ ]
A. made of
B. made in
C. made for
D. made from
简述并行通信和串行通信的优缺点。