传染病流行过程的影响因素有_______和_______,其中_______有重要的影响。
参考答案:自然因素;社会因素;社会因素
句型转换(5分)
小题1: Sally is going to visit France next year.(改为一般疑问句)
Sally to visit France next year?
小题2: They can have some bread for lunch this afternoon. (改为一般疑问句)
they have bread for lunch this afternoon?
小题3:I want to watch a game show. (改为一般疑问句)
want to watch a game show?
小题4: My uncle has an interesting toothbrush(牙刷) in his bathroom. (改为复数)
My uncles many interesting in their bathrooms.
小题5:There will be a sports meeting next month in our school.(改为否定句)
There a sports meeting next month in our school.
假设消费者在T年(退休前)时预计到退休后每年可得额外的退休金10 000元,则根据生命周期假说,该消费者与原来相比较,将( )。
A.在退休前不改变,退休后每年增加10 000元的消费
B.在退休前增加10 000元的消费,退休后不增加消费
C.以T年起至生命结束时每年增加消费10 000元
D.将退休后可得的退休金总额均匀的用于增加T年以后的消费中