Which of the following includes dark lateral sounds?
A. film
B. learn
C. small
D. lark
查看答案
/l/ is produced with potential air flow around both sides of the tongue. It has two distinctive allophones: clear lateraland dark lateral.
A. 对
B. 错
When the lateral sound /l/ appears before a vowel, a dark lateral sound is produced.
A. 对
B. 错
动物从饲料中获得热能最经济和最主要来源的物质是（ ）。
A. 蛋白质
B. 脂肪
C. 碳水化合物
D. 维生素
下列动物易于消化吸收的糖类物质是（）。
A. 纤维素
B. 半纤维素
C. 淀粉
D. 果胶
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