【简答题】模拟乘法器输出与输入的关系式是U0=( ),电路符号是( )。
【单选题】Though the girl had been suffering from the blood disease, she acted as if nothing ________ while facing her friends and relations.
【单选题】Though the girl had been suffering from the blood disease, she acted as if nothing____ to her while facing her friends and relation.
【单选题】the smiths decided to _____ a boy and a girl though they already had three children.