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
24
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] (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://tihaiku.com/zcyy/3884514.html
相关试题推荐
"Themanputonhishat"istransformedinto"Themanputhishaton".Thenwhic
Accordingtothenewresearch,theoddshapemoundswereformedby______.[br]
Accordingtothenewresearch,theoddshapemoundswereformedby______.[origi
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
LangstonHughesandHisWork:InsideandOutI.GeneralIntroductionofLangston
Thepearlisalustrousroundedgemformedinsideamollusk(软体动物).Since
Thepearlisalustrousroundedgemformedinsideamollusk(软体动物).Since
随机试题
Mr.Brown,whowasnoteasilysurprised,wasquite______whenheheardtheresult
[originaltext]TheUNdiplomatinchargeofoverseeingarmsinspectionteams
WatchingTweedandJefferybattle,Alicewonderedwhathadcausedthispointless
关于商标权的叙述错误的是( )。A.商标需要注册,未注册的商标即使能带来经济效
试述肝脓肿的诊断?
某公司的销售净利率为6%,总资产周转率为3,资产负债率为80%,则该公司的净资产
请认真阅读下列材料,并按下面要求作答。 请根据上述材料完成下
不符合十二指肠溃疡疼痛特点的叙述是 A.节律性上腹痛B.周期性疼痛C.疼痛
作为ATP贮存库的磷酸肌酸主要存在于 A.肝B.褐色脂肪组织C.肌肉组
中医学认为,构成人体的中心是A.五脏 B.六腑 C.奇恒之腑 D.形体官窍
最新回复
(
0
)