地面大风通常会对飞行构成影响，当地面图上风力达到（）时标志大风标记。
A.8M/S
B.12M/S
C.16M/S
D.20M/S
参考答案：B
He said he _________ his work, and then we needed to wait for him for a little while.
A．just finished
B．was just finishing
C．had just finished
D．was just finished
病历摘要：患者男性，67岁，间歇性无痛性全程肉眼血尿20天。无尿频、尿急和尿痛。无排尿费力。夜尿3次。
初步诊断？（）
A.膀胱癌
B.肾盂癌
C.输尿管癌
D.肾癌
E.良性前列腺增生
F.膀胱结石
