在浮点表示方法中，（）是隐含的。
A、位数
B、基数
C、阶码
D、尾数
参考答案：B
Some of the engines were not suitable for the work they were ________ for.
A．intended
B．to intend
C．intending
D．being intended
晶状体囊外摘除术后，后囊膜发生混浊，称为
A．后发性白内障B．并发性白内障C．假性白内障D．瞳孔膜闭E．外伤性白内障
