能直接刺激甲状腺腺体增生和甲状腺激素分泌的物质是
A．TRHB．TSHC．CRHD．T3和T4E．ACTH
参考答案：B
The boy wanted to play football in the street, but his parents told him ______.
A. not to B not to do C. not do it D. do not to
采用成本分析模式、存货模式和随机模式确定现金最佳持有量时，均需考虑的成本因素是( )。
A．转换成本B．短缺成本C．管理成本D．机会成本
