对每艘中国籍船舶的一次安全检查应不少于“船舶安全检查通知书”所列项目的（）。
A．1/4
B．1/3
C．1/2
D．2/3
参考答案：D
—_____?
—He is helpful. He's always ready to help anyone in need. [ ]
A. How's your new friend like?
B. What's your new friend like
C. How do you like your new friend?
D. What do you think your new friend
钢轨螺孔裂纹产生和发展的原因是什么？
