A seed planted in the sensitive lining of an oyster begins a perpetual coating process that forms a pearl.（　）

A:total B:annual C:continual D:habitual

A seed planted in the sensitive lining of an oyster begins a perpetual coating process that forms a pearl.

A:total B:annual C:continual D:habitual

An oyster produces a pearl by coating a grain of sand inside its shell with nacre, a secretion of its body.

A:makes B:attains C:binds D:cures

汉译英：“压缩机；涂料；金刚砂”，正确的翻译为（）

A:cashmere; compressor; coating B:compressor; coating; carborundum C:coating; carborundum; compressor D:carborundum; ashmere; coating

汉译英：“压缩机；涂料；金刚砂”，正确的翻译为：( )。

A:cashmere; compressor; coating B:compressor; coating; carborundum C:coating; carborundum; compressor D:carborundum; ashmere; coating

汉译英：“压缩机；涂料；金刚砂”，正确的翻译为：( )。

A:cashmere; compressor; coating B:compressor; coating; carborundum C:coating; carborundum; compressor D:carborundum; ashmere; coating

汉译英：“压缩机；涂料；金刚砂”，正确的翻译为：( )。

A:cashmere；compressor；coating B:compressor；coating；carborundum C:coating；carborundum；compressor D:carborundum；ashmere；coating