中国是世界上少数几个能自行研制核潜艇的国家之一，我国第一艘核潜艇在（）交付海军正式服

A father was sitting at his desk and looking at bills(账单) when his young son ran in and said, “Dad, today is your birthday and you’re 40 years old,    1   I’m going to give you 40 kisses, one for each year!” When the boy    2   kissing him, the father shouted, “Andrew, don’t do this right now. I’m too    3  !”

The boy stood there and tears (眼泪)    4   from his big blue eyes. Feeling sorry, the father said, “You can do it later.”

The boy said nothing but walked away    5  . That evening the father said, “Come and     6    the kisses now, Andrew!” But the boy didn’t.

Unfortunately, a few days after the father’s birthday, the boy had a(n)    7   and died(死). His sad father wrote, “If only I could tell him how sorry I am for words, and how    8   my heart is hurting.”

Love is a two-way street. We must warmly accept(接受) any loving act, or others will regard it     9   a “no” and it can leave a scar(伤痕). If we don’t get love, our life will have no meaning. Nothing is more important than    10   love from those who are near and dear to us.

小题1:A. because                    B. so                     C. but

小题2:A. stopped                    B. forgot               C. started

小题3:A. busy                    B. angry                    C. hungry

小题4:A. felt                       B. fell                     C. flew

小题5:A. excitedly               B. friendly                 C. quietly

小题6:A. finish                  B. get                  C. take

小题7:A. matter                  B. accident                 C. event

小题8:A. many                    B. much                     C. long

小题9:A. as                      B. with                     C. for

小题10:A. giving                     B. asking               C. accepting

在一段东西方向上的平直公路上，有一辆质量m=10T的卡车，正在向东加速行驶，在经过t=50s的时间内，卡车的速度从v₁=5m/s均匀增大到v₂=15m/s，已知卡车在运动时受到的阻力为车重的k倍，且k=0.05，g=10m/s²．试求：

（1）卡车在这段时间内动能的变化量？

（2）在这段时间里的中间时刻，发动机的瞬时功率？

（3）在这段时间内卡车的牵引力所做的功？

黄土高原的治理措施是（　　）

A．兴建南水北调工程

B．改良盐碱地，改善农业生态环境

C．治理水土流失，改善生态环境

D．大力兴修水利，发展粮食生产

系统性红斑狼疮患者特异性最高的抗体是

A．抗Sm抗体
B．抗SSA抗体
C．抗dsDNA抗体
D．抗核抗体(ANA)
E．抗RNA抗体

影响文件系统可靠性因素之一是文件系统的一致性问题，如果读取（1）的某磁盘块，修改后在写回磁盘前系统崩溃，则对系统的影响相对较大。通常的解决方案是采用文件系统的一致性检查，一致性检查包括块的一致性检查和文件的一致性检查。在块的一致性检查时，检测程序构造一张表，表中为每个块设立两个计数器，一个跟踪该块在文件中出现的次数，一个跟踪该块在空闲表中出现的次数。若系统有16个块，检测程序通过检测发现表（2）状态下的文件系统是一致的。

空白（2）处应选择（）

A.

B.

C.

D.