患者周期延后，量少，色黯淡，质清稀，带下清稀，腰膝酸软，头晕耳鸣，面色晦暗，舌淡，苔

My classmate, John. He eats _______ every day, so he is unhealthy.         [ ]

A. lots of              

B. a lot of          

C. many          

D. a lot

质量标准

________ is no reason for dismissing her.

A．Because she was a few minutes late

B．Owing to a few minutes late

C．The fact that she was a few minutes late

D．Being a few minutes late

某矿石样本含有如图所示的四种元素，该矿石中可能含有的物质是

A．CaCl₂

B．SiO₂

C．H₂O

D．Fe₂O₃

局域网软件主要由网卡驱动程序和（）两个基本部分组成。