问题
问答题 简答题
简述假山造型禁忌。
答案
参考答案：
（1）忌对称居中。
（2）忌重型心不稳。
（3）忌杂乱无章。。
（4）忌“铜墙铁壁”。
（5）忌纹理不顺。
（6）忌“刀山剑树”。
（7）忌“鼠洞蚁穴”。
（8）忌“叠罗汉”。
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简述假山造型禁忌。
参考答案：
（1）忌对称居中。
（2）忌重型心不稳。
（3）忌杂乱无章。。
（4）忌“铜墙铁壁”。
（5）忌纹理不顺。
（6）忌“刀山剑树”。
（7）忌“鼠洞蚁穴”。
（8）忌“叠罗汉”。
| The most popular organic gem is the pearl. A pearl is the response of a marine mollusk to the presence of an irritating impurity accidentally introduced into its body; a cultured pearl is the result of the intentional insertion of a mother-of-pearl bead into a live mollusk. Whether introduced accidentally or intentionally, the pearl-making process is the same: the mollusk coats the irritant with a substance called nacre. Nacre is composed chiefly of calcium carbonate. Because very few natural pearls are now on the market, most pearls used in free jewelry are cultured. These include "Biwa" pearls and most other freshwater pearls. Cultured pearls are not easily distinguished from natural pearls except by an expert. |
Cultured pearl is formed by ______.
A．insertion of a pearl into a live mollusk
B．an oyster into which a piece of grit has been placed
C．putting in a live mollusk
D．placing a bead into culture