a biocontrol agent may adapt in unpredictable ways, so that it can feed on or otherwise harm new hosts.
C选项只能证明这种进化是在这里发生的,并不能证明这个进化能完成一定就是由于部分土地没有没过去...
城市空气比农村空气含有更多二氧化硫,城市的植物比农村植物长得慢。在一个实验中,测试因为二氧化硫对生长造成影响有多不一样,城市和农村学校的班级在学校的温室中种植物,过滤温室空气去除二氧化硫。城市温室中的植物比农村温室中生长更慢。
ABC不能解释,排除
C选项:本选项在平行方面没有问题,但是在中间出现了 like they were more recently,由于they were more recently是一个句子,所以它必须由连词引导。like只能做介词,不能充当连词。
B选项:having the power部分是不正确的。句末的分词短语通常是伴随状语,因此这里having the power是the sky was the floor的伴随(状语具有就近修饰的原则),即,having的逻辑主语为sky。显然地,拥有能力的是人(Esaugetu Emissee)而不是sky。
Again it is true that the great majority of tragic heroes do possess hubris, or a proud and passionate mind that seems to make the hero’s downfall morally explicable. But such hubris is only the precipitating agent of catastrophe, just as in comedy the cause of the happy ending is usually some act of humility, often performed by a noble character who is meanly disguised.
Clearly price promotions are generally run at a loss, otherwise there would be more of them.
E选项:using thin layers是现在分词短语,其作定语修饰名词the cigarette。香烟不能发出use这个动作,错误同选项(C)。第二,in decreasing应该改成不定式短语to decrease,该错误同选项(B)。第三,which slows最后应该改成现在分词短语slowing,该错误同选项(B)。
A为啥不对呢....
30!/10!化简了10!中的,所以最小从11开始
C(5,20)/C(4,20)
g/4=t/6
(1) n is multiple of 5. If n=5, then n yields the remainder of 5 when divided by 6 but if n=10, then n yields the remainder of 4 when divided by 6. We already have two different answers, which means that this statement is not sufficient.
在工资增加之前,杰克的时薪比马克的每小时多5美元——这里不需要做代数运算:工资增加6%,他们之间的差值也会增加同样的6% so 新差值 5*1.06。sufficient
no rain on first day, no rain on second day, rain on third day (Monday).
CD区分:
BE区分
AC差异:
选了B 没多想pause equally frequently whether the chase is up or down an incline 这句话。。。。。。。