问题
单项选择题
某船No.3舱底舱容积为2110m3，舱高5.38m，计划配装两种货物：下层A货624t（S.F=0.86m3/t），为保证船舶局部强度，可在上层装S.F=1.31m3/t的B货（）t。
A．523
B．723
C．895
D．915
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
某船No.3舱底舱容积为2110m3，舱高5.38m，计划配装两种货物：下层A货624t（S.F=0.86m3/t），为保证船舶局部强度，可在上层装S.F=1.31m3/t的B货（）t。
A．523
B．723
C．895
D．915
参考答案：C
| 完形填空。 | ||||
| Thousands of years ago, people did not know 1 to make a fire. When it was very 2 at night, they could not sleep well. Sometimes lightning hit (打, 击) a 3 and started a fire. At first people were both surprised and 4 to see the fire. They were afraid to go up. Later a few 5 men took some of this fire and made a fire near their homes. They used the fire to keep them warm and to cook food. When they had a fire, they did not let it 6 burning. If it stopped, they could not start it again. Maybe they had to 7 for a long time, sometimes for 8 . Later they 9 how to make a fire with pieces of wood. Now we have matches, we can put them in our pockets and make a fire when we want to make it. But we have to be 10 with fire. | ||||
|