当逻辑变量A=1、B=0、C=1时，求逻辑函数的值为（）。
A．0
B．1
C．2
D．3
参考答案：A
下列碱基置换的后果错误的是()
A．终止密码突变
B．无义突变
C．错义突变
D．染色体畸变
E．同义突变
He was so disappointed that he angrily chose______music he could find in the hope that it might at least seem funny.
A．worse
B．the worse
C．worst
D．the worst
