下列哪个软件不属于手机助手类的软件（）
A.天翼手机助手
B.91手机助手
C.豌豆荚
D.安智市场
参考答案：D
—Do you think Frank is free today?
—______. Recently he has been busy studying for the final exam.[ ]
A. Me too
B. Of course
C. The same to you
D. I don't think so
肺癌的临床表现中，最常见的早期症状是
A．咯血
B．咳嗽
C．发热
D．胸痛
E．呼吸困难
