题目理解,题干的意思是 因为睡觉前,该成分一直累积变高,睡觉后该成分降低,所以该成分的累积导致睡觉。
a cycle for personal computer users in which personal computer users, especially corporate consumers, are replacing their PC's with more powerful models has begun.
E the Shang were well known for xxx
D 可以用They
wider range of options :说明需要的时间比以前更多了
文章理解问题!
1 + x + y + xy看到这个形式应该就要转换成两个数相乘
审题错误,条件2 说的是 Y 的may和Y的june 比
问题的关键是have never been sighted on the Sun's poles or equator 是修饰sunspots还是dark spots(X)的
C选项:时态错误最后来看,我们看as weak as省略了什么
B选项:即使不知道not ... yet ...可不可以,后面的it was safe for them (没有households这个词去做指代)也出卖了这个选项
SVA rising inventories ... possible leadS 首先排除 (B) (D)
(A) those 不可以能去指代 41 million tons, 否则后面就变成了 41 million tons of the 1978 harvest
it evolved independently of the vertebrate eye
可以排除的错误
介词短语在句首可做定语 (也可做状语),去就近修饰主句的主语
has raised hope for a recovery <定语>,核心词是 a recovery
OG:
fail in doing something = 在做某件事当中(失败了)
三者应该是并列的