首页
登录
职称英语
Which of the following is true about the immunity to HIV? [br] [originaltext]Ab
Which of the following is true about the immunity to HIV? [br] [originaltext]Ab
游客
2023-12-25
28
管理
问题
Which of the following is true about the immunity to HIV? [br]
About 10 percent of Europe’s present-day population seems to be resistant to HIV -- a significantly higher proportion than on other continents. Researchers have traced this immunity to a genetic mutation that seems to have appeared some 2,500 years ago, and that protects white blood cells against penetration by HIV. From the mid-14th century through the 17th century the prevalence of the mutation increased, in tandem with repeated outbreaks of the plague. The researchers suggest that the mutation protected against the disease, which culled the population of people who lacked it.
A recent report finds that the number of working hours in Asia has started to decline. But the economists say that what is needed is not only a reduction in working time, but also more flexibility in working hours. Both businesses and workers would profit if working hours can be adjusted according to demand, allowing workers to better control their days. And, as many economies in the region see a growth in service industries, such as hotels and restaurants, which need flexible work schedules, more flexibility could help boost growth.
选项
A、They don’t think that the working hours need reducing.
B、They think that a flexible working schedule is also desirable.
C、They think that working hours have declined satisfactorily.
D、They believe the flexible working hours benefit workers only.
答案
B
解析
1)段首处but之后的内容往往是全段中心内容。2)段落中的中心词,包括其词形变化形式往往频繁出现,如段首中心句中的中心词flexibility 及其形容词 flexible在该段出现若干次。
转载请注明原文地址:https://tihaiku.com/zcyy/3302911.html
相关试题推荐
Ifyouleftyourbookonthetableovernight,youwouldfindthefollowingm
Ifyouleftyourbookonthetableovernight,youwouldfindthefollowingm
Ifyouleftyourbookonthetableovernight,youwouldfindthefollowingm
Ifyouleftyourbookonthetableovernight,youwouldfindthefollowingm
Ifyouleftyourbookonthetableovernight,youwouldfindthefollowingm
Followingayearoffastdevelopment,bythefirstquarterofthisyear,Chinah
Followingayearoffastdevelopment,bythefirstquarterofthisyear,Chinah
Followingayearoffastdevelopment,bythefirstquarterofthisyear,Chinah
Followingthenewdiscovery,thescientistshadfinallyprecludedthedoubtson
[originaltext]下面你将听到的是一段有关经济发展的讲话。Iwouldliketocommentontherelations
随机试题
Thoughthecharactershankerfortheirscarstofadeandbeforgotten,it’swhen
Thefirstparagraphmainlyindicatesthat______.[br]Theunderlinedword"filt
Forestisacomplexecosysteminwhichtreesarethedominantlifeform.Tre
Westerndoctorsarebeginningtounderstandwhattraditionalhealershaveal
军事巨著militarymasterpiece
Genetics,thestudyofgenes,isgainingincreasingimportance.Genescan【B1
将硬盘中的数据读入到内存中去,称为A.显示 B.读盘 C.输入 D.写盘
各种典型的涂料助剂有()。A.防沉剂、润湿剂、分散剂 B.消泡剂、催干剂、流平
女,30岁。因心悸心慌30分钟前来就诊,心电图示阵发性室上性心动过速,按压眼球及
构建中国特色现代军事力量体系是建设世界一流军队的力量基础。总体来说,就是要加快形
最新回复
(
0
)