为了醒目，制作接站牌尽量使用白纸黑字。
A. 对
B. 错
The breakdown of food in the digestive canal refers to ______process
A. physical and chemical
B. biotic and pathological
C. absorptive and physical
D. biotic and chemical
Salivary glands consist of except_____
A. sublingual gland
B. submandibular gland
C. parotid gland
D. adrenal gland
____ is the primary absorptive region of the small intestine.
A. jejunum
B. ileum
C. stomach
D. appendix
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