脾脏的哪个区域为胸腺依赖区？（）
A．白髓淋巴滤泡
B．红髓的脾索
C．红髓的脾窦
D．白髓中央小动脉淋巴鞘
E．白髓的生发中心
参考答案：D
脂肪酸β氧化酶系存在于
A．胞液B．线粒体基质C．内质网D．线粒体内膜
You are not supposed to _______ your notes during any test in our school, or else you’ll be punished.
A．stick to
B．refer to
C．keep to
D．point to
