下列不属于人体内分泌腺的是[ ]

A．甲状腺

B．唾液腺

C．肾上腺

D．脑垂体

写作。

     假设你是李华，18岁生日后，真的有种长大成人的感觉。于是你想就父母对你的关怀和你今后

的打算，以书信形式同爸爸妈妈谈谈。信的开头和结尾如下：

Dear Mum and Dad,

     How are you doing?

     ________________________________________________________________________________

___________________________________________________________________________________

___________________________________________________________________________________

                                                                                                                           Yours sincerely,

                                                                                                                            Li Hua