在我国诱发再障的最主要因素可能为()
A．电离辐射
B．职业性接触有害物质
C．化学因素
D．环境污染
E．遗传原因
参考答案：C
--- Tommy is planning to buy a car.
--- I know. By the time he returns from abroad, he ________ enough for a used one.
A．will have saved
B．saves
C．had saved
D．will save
佛山的气候类型是[ ]
A．热带雨林气候
B、热带季风气候
C、亚热带季风气候
D、温带季风气候
