小肠是吸收的最主要部位，这主要与小肠的哪项特点有关？（）
A．长度
B．肠壁厚
C．通透性高
D．面积大
E．消化酶多
参考答案：D
补全对话。
A: Which is your favorite festival in a year?
B: 1_______ is my favorite festival.
A: 2_______ is it?
B: It's 3________ 15th August.
A: 4_______ do you like it so much?
B: My family always has a party. And I can eat 5_______.
A: What do you think of the food?
B: It's delicious.
在一机多票开票子系统V6.15中，同一张增值税普通发票（）税率的商品。
A.只可开具同一种
B.只可以开具含有4%和6%
C.可以开具多种
D.可以开具小于31%的各种
