Steel is harder than iron. 钢比铁更硬。
3.the+比较级，the+比较级：越来越…The nearer an object is to us, the larger it looks.
4.more and more越来越多
colder and colder越来越冷
2.to blame… on
5.out of step
6.to leave … alone
1.The problem of Jet Lag is one every international traveler comes across at some time. (para.1)
2.The effects of rapid travel on the body are actually far more disturbing than we realize. (para.2)
3.He later blamed his poor judgment on Jet Lag. (para.3)
4.Now that we understand what Jet lag is , we can go some way to overcoming it (para.4)
5.The other belongs in our internal clocks which , left alone, would tie the body to a 25 hour - yes , 25 - rhythm.(para.5)
6.In time the physiological system will reset itself, but it does take time. (para7)
7.One reason for this discrepancy is that different bodily events are controlled by different factors. (para.8)
8.It is not feasible to wait four days until the body is used to the new time zone. (para.9)
9.But the growth hormone is released during sleep, whenever in the day that sleep occurs.(para.9)
10.Protein in meals stimulates wakefulness, while carbohydrates promote sleep.(para.13)
It is not difficult to understand the disturbing effects of rapid travel on the body.
It is not difficult to realize that the disturbing effects on the body are caused by rapid travel.
One reason for this discrepancy is that different bodily events are controlled by different factors.
Protein in food stimulates wakefulness, while carbohydrates promote sleep.
The problem of Jet Lag is one every international traveler comes across.
It is not feasible to wait a few days until the bodys regulatory mechanisms are used to the new time zone.
1.In practical application, concentration is not _____ the definition may imply. (99.4)
A.as simple to deal successfully with as
B.so simple to deal successfully with that
C.simpler to deal successfully with as that
D.as same simple to deal successfully with as
考点：本题主要考查as … as 搭配表示"和…. 一样"。而选项D 中as 的后面还有一个词same 。 因为same 表示的意思也是同样，与…同样的意思与as … as 意义重复，因此不选D。
2.Understand what Jet Lag is, and how a careful diet can minimize its worst effects, ______. （99.10）
A.your flight will be less stressful
B.and your flights will be less stressful
C.or your flights will be less stressful
D.in order that your flights will be less stressful
3.Coffee delays the body clock in the morning, and advances _____ at night. (00.4)
分析：本句是个并列句，and 连接的两个句子结构应一致。因此，advances 后面的宾语应是the body，而为了避免重复，因此用代词it 代替。
The effects of rapid travel on the human body are much greater than we realize.
5.The other timing system belongs in our internal clocks, which, left ______, would tie the body to a 25-hour rhythm. (03.4)