首页
登录
职称英语
The pearl is a lustrous rounded gem formed inside a mollusk (软体动物) . Since
The pearl is a lustrous rounded gem formed inside a mollusk (软体动物) . Since
游客
2024-12-25
38
管理
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)______ [br] (1)
选项
答案
Since — Although
解析
第一个分句的意思是珍珠可以由任何带壳的软体动物形成,第二个分句的意思是最珍贵的珍珠是由牡蛎形成的。两个分句之间的逻辑关系显然并不是因果关系,而是让步关系,所以应该改成Although。
转载请注明原文地址:http://tihaiku.com/zcyy/3884508.html
相关试题推荐
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
TheContinentalDivideisformedin.A、theAppalachianMountainsB、theRockyMou
Thepearlisalustrousroundedgemformedinsideamollusk(软体动物).Since
Thepearlisalustrousroundedgemformedinsideamollusk(软体动物).Since
Thepearlisalustrousroundedgemformedinsideamollusk(软体动物).Since
Thepearlisalustrousroundedgemformedinsideamollusk(软体动物).Since
随机试题
Mr.andMrs.RajahHassimweregoingtoeatout.Mr.Hassimtelephonedinthe
TheInternetprovidesanamazingforumforthefreeexchangeofideas.Give
PositiveforYouthaimstoplaceteenagersandyoungpeopleatitsheart.Th
A.液化性坏死 B.凝固性坏死 C.两者皆有 D.两者皆无脾梗死()。
以“思想、信息和智力”为基础的组织被称为()A.“三叶草”组织 B.“三I”
与晚期卵巢癌最易混淆的疾病是:()A.子宫腺肌病 B.淋病性盆腔炎
依据《建设工程项目管理规范》GB/T50326——2006,下列选项中可由项目经
能抑制病毒DNA多聚酶的抗病毒药是A.干扰素 B.金刚烷胺 C.阿昔洛韦
抽象逻辑思维和言语中枢的优势半球是()。
教学评价是一种系统化的持续过程,包括()。 A.确定评估目标B.搜集有关的
最新回复
(
0
)