某船排水量Δ=8000t,现如果在其重心之下3m处加载货物400t,则此项加载对初稳性高度的影响是()m。
A.-0.20
B.+0.20
C.-0.14
D.+0.14
参考答案:D
They ask about the things and teachers ______ they still remembered in the school.
A.which
B.that
C.whom
D.who
测定食品中灰分时,首先准备瓷坩锅,用盐酸(1:4)煮1~2小时,洗净晾干后,用什么在坩锅外壁编号。()
A、FeCl3与蓝墨水
B、MgCl2与蓝墨水
C、记号笔
D、墨水