要是细胞膜仅具有自由扩散的运输方式，则处理该细胞的物质最有可能是[ ]
A．淀粉酶
B．蛋白酶
C．脂肪酶
D．麦芽糖酶
答案：B
Only ______ allowed to take part in the speech contest in our class and so the rest ______ disappointed.
A．was John; were
B．John was; were
C．was John; was
D．John was; was
在影响房地产价格的各因素中，“城市化”属于( )。
A．社会因素
B．环境因素
C．人口因素
D．行政因素
