首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The pearl is a lustrous rounded gem formed inside a mollusk (软体动 物) . Since pearls may be formed by any shelled mollusk, the mos
The pearl is a lustrous rounded gem formed inside a mollusk (软体动 物) . Since pearls may be formed by any shelled mollusk, the mos
admin
2012-10-19
35
问题
The pearl is a lustrous rounded gem formed inside a mollusk (软体动
物) . Since pearls may be formed by any shelled mollusk, the most valu- (1) ______
able pearls are obtained from the oysters. Except for imitation pearls, which (2) ___
are entirely man-made, all pearls are formed from a secretion (分泌物)
around an irritating body that enters the soft tissue of a mollusk.
If an irritating body enters the mollusk by accident, a natural pearl (3)______
forms. A cultured pearl forms if the irritating body is deliberately placed in
the mollusk by the man. (4)______
Unlike to other gems, pearls have a natural luster, and they do not need (5)______
to be polished. Although they are usually white or cream-colored, they may
also be any shade of pink, yellow, green, grey, or black. The most desirable
pearls are white with a creamy or pinkish cast. Black pearls are also very
valuable because of their scarce. (6)______
Imitation pearls are often made to appearing very similar to natural (7)______
pearls. Moreover, they do not have the luster of natural or cultured pearls. (8)______
Another way of distinguishing between imitation and natural or cultured
pearls is by gently rubbing the pearls through the surface of a tooth. Imita- (9)______
tion pearls feel smoothly, while natural or cultured pearls feel rough. (10)______
(7)
选项
答案
appearing — appear
解析
“be made”后面应该跟带to的动词不定式作主语补足语。所以这里的to并不是介词而是动词不定式的标志。
转载请注明原文地址:https://kaotiyun.com/show/BOiO777K
0
专业英语八级
相关试题推荐
A、agoodcharactertopleasebothDemocratsandRepublicansB、beingintellectualandcompetentforthejobC、senseofjusticean
Duringthetraditionalweddingceremony,theCD#6bridalcouplepromiseseachotherlifelong【M1】______devotion.Yet,a
Theperiodofadolescence,i.e.,thepersonbetweenchildhoodandadulthood,maybelongorshort,dependingonsocialexpectat
Exceptatnight,theyhardlyeverhavetimetogether.HeoftensitsaloneinthehousewaitingforJulietocomehome.Itwouldb
Note-takinginLecturesForlisteners,note-takingisanessentialwaytoachievebetter-understandingofalecture.Itinvo
Theideathatgovernmentshouldregulateintellectualpropertythroughcopyrightsandpatentsisrelativelyrecentinhumanhist
Whatisaportcity?Asacenterofland-seaexchange,amajorsourceoflivelihood,amajorforceforcultural【1】,theport
Whatisaportcity?Asacenterofland-seaexchange,amajorsourceoflivelihood,amajorforceforcultural【1】,theport
Havingsaidallofthis,Ishould,perhaps,locatemyself.IteachandwriteaboutalooseandbaggyterritorycalledLasAmeric
TheLaborPartyhaditsoriginsinthe______,whichwasformedinJanuary,1893.
随机试题
盘式制动器是怎样工作的?有什么结构特点?
以下对“可在乳汁中排泄的药物的特性”的叙述,正确的是()
估价资料的保管期限一般为(),从估价报告出具之日算起。保管期限届满但估价所服务的行为未了的估价资料,应当保管到估价所服务的行为完结为止。
若名义利率为r,年初借款为P,在一年中计算利息m次,则每一计息周期的利率为r/m,一年后的本利和为:F=P(1+r/m)m,其中利息I=F-P=P(1+r/m)m-P,故实际利率i与名义利率r的关系表达式应为:i=(F-P)/P=(1+r/m)m-1通过这
所谓的()是针对本企业(或行业)事故的基本情况和事故的发展趋势而建立起来的识别指标。
1999年11月20日我国第一艘载人航天试验飞船()发射成功。
个性化的教育,主张从学生个体出发,基于每个学生的特殊性,培养学生的个性。实现每个学生的最充分发展。高一下学期地理课上,老师问:黄河往哪流?一学生唱道:大河向东流啊!老师没有理会他,接着问:太阳系有多少颗行星?那学生又唱:天上的星星参北斗啊!老师气
你去办公室给领导送一文件,看见领导桌上放了一封关于自己的检举信,这时你怎么办?若过了一段时间领导还没有找你谈话,你认为是什么原因?你会如何做?
ThetriptotheMysteryCaveswilltakeplaceonSunday,27July.YoucanbookyourticketsinRoom188between2:30p.m.every
Readthememoandnotebelow.Completetheclaimformgivenbelow.Writewordorphrase(inCAPITALLETTERS)oranumbero
最新回复
(
0
)