I often play ping-pong on Saturdays. What you?[ ]
A. are
B. about
C. /
答案：B
男性左侧肾肿瘤可引起
A．左侧睾丸鞘膜积液B．左侧精索静脉曲张C．左侧睾炎肿大D．左侧附睾炎E．左侧附睾囊肿
公司业务产品手册涉及的产品数量有（）个。
A.150
B.210
C.230
D.240
