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
12
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] (8)
选项
答案
Moreover — However
解析
moreover是一个连接性副词,关键看它是否正确地连接了前后两个句子。前一个句子的意思是人造珍珠看起来和天然珍珠非常相似。后一个句子的意思是它们没有天然珍珠或养殖珍珠的光泽。两个句子的关系显然不是递进,而是转折的关系,所以应该用上另一个连接性副词however。
转载请注明原文地址:https://tihaiku.com/zcyy/3884515.html
相关试题推荐
Accordingtothenewresearch,theoddshapemoundswereformedby______.[br]
Accordingtothenewresearch,theoddshapemoundswereformedby______.[origi
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
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
Thehistoricdropindrivingthatbeganin2007andthedramaticdeclinein
Ahundredyearsago,itwasassumedandscientifically"proved"byeconomists
设有职工EMP(职工号,姓名,性别,部门号,职务,进单位时间,电话),职务JOB
下列哪种细胞因子不是体液免疫应答过程产生的A.TNF-β细胞 B.IL-6
治疗阴虚火旺之郁证,应首选( )。A.二阴煎 B.滋水清肝饮 C.天王补心
五班四运转的轮休制的循环期为()A.6天 B.8天 C.9天 D.10天
以下哪一项属于高级管理知识性人才()A.发展战略的执行者 B.组织变革的实施
班主任以教育目的为指导思想,以“学生守则”为基本依据,对学生一个学期内在学习、劳
甲市L区居民叶某购买了住所在乙市M区的大亿公司开发的位于丙市N区的商品房一套,合
牙膏洁净剂又称( )。A.发泡剂或表面活性剂 B.润滑剂 C.摩擦剂 D
最新回复
(
0
)