返砂比的表示符号是()
A.c
B.n
C.Q
参考答案:A
--- I suppose we’ll go to plant trees tomorrow.
--- Sounds great! That’s a lot of fun. I’d like to you.
A.visit
B.join
C.drop
D.meet
一般情况下,散装谷物在舱内移动后,船舶重心会()。
A.升高
B.降低
C.既降低又水平移动
D.既升高又水平移动