【单选题】通常说船舶的舵效较好是指舵叶转过一定的舵角后能使船在较()的时间内,较()的距离上,转过一个较大的角度。
【单选题】Henson is but one name on a long list of courageous men and women. What does "but" mean in this sentence?
【单选题】Who was Josiah Henson?
A.
He was Barbara Carter’s great-great-grandfather.
B.
He was an African-American Moses.
C.
He was but one name on a long list of courageous men and women who together forged the Underground Railroad to liberate slaves from the American South.
【简答题】确定加工余量的方法有 、 、和 等三种。
【单选题】Who is the guide to Henson's last home?
C.
Henson's granddaughter
【单选题】大半圆弧直径尺寸数字前应标注的符号是( )。
【单选题】通常说船舶的舵效较好是指舵叶转过一定的舵角后能使在较()的时间内,较()的距离 上,转过一个较大的角度。
【判断题】独立步弹腿,在弹腿之前应先有一个下沉的动作
【单选题】50· 通常说船舶的舵效较好是指舵叶转过一定的舵角后能使船在较( )的时间内,较( )的距离上,转过一个较大的角度。