单项选择题

您的食宿将由我们航空公司负责。可以表达为： Your tickets will be arranged by our airline.

A．对
B．错

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肥胖引起胰岛素抵抗的机制是（）。

A产生异常结构胰岛素
B产生胰岛素抗体
C产生胰岛素受体抗体
D胰岛素降解增加
E脂肪组织和肌肉组织摄取葡萄糖功能受损

单项选择题

About stem cell, which of the following is not true?
A、 The developmental potential of iPS cell is totipotent.
B、ISCs can produce differentiated absorptive cells and mucus-secreting cells in intestine.
C、Stem cells can divide throughout the organism’s lifetime.
D、After division, stem cells yield some progeny that differentiate and others that remain stem cells.
E、 HSCs can give rise to all classes of blood cells.