阅读理解。 Mama and Daddy loved having the fa

题型:阅读理解

问题:

阅读理解。

      Mama and Daddy loved having the family together on Christmas. They spent days making candy and

cookies, preparing gifts and decorating.

      Forty-four years together made them a great team. But with Mama's unexpected death in the spring,

we now faced our first Christmas without her. The holidays would be especially hard for Daddy. We tried

to comfort him. We would all be with him on Christmas as usual.

      On Christmas Eve a small snow turned to a heavy one, covering our yard and 150-foot driveway, as

well as the access road (干道的支路). We started cleaning, but the snow was falling faster than we could

keep up. The weatherman predicted the storm would continue through the night. Church services were also

canceled. "We'll be there as soon as possible in the morning," I told Daddy on the phone. But inside I wondered

how. 

      Early Christmas morning we began digging through stomach-high snow. We finished the driveway, but

seeing the mountains of snow on the access road, we admitted failure. As I stared at the access road, I heard

the sound of a snowblower. Lord, please help us get to Daddy today, I prayed.

      The sound of the snowblower grew louder. I looked up. There, coming straight toward us was a big

yellow machine with a huge plow (犁) effortlessly clearing a path through the snow-packed road. I stared in

disbelief. Never in our 18 years here had the snow been plowed on this road.

      The driver of the snowblower sat up straight at the wheel and was warmly dressed, collar (衣领) up, cap

down-and wings beneath his coat, I'm sure.

1. We learn from the passage that the author's parents _____. [ ]

A. separated a year ago

B. were married for forty-four years

C. like spending holidays very much

D. have prepared for this Christmas for days

2. The author started to clean the snow in order to _____. [ ]

A. go to church

B. have a clean driveway

C. go to please his father

D. send his children to school

3. Before the snowblower arrived, the author had _____. [ ]

A. decided to give up

B. stopped to have a rest

C. finished the access road

D. cleaned the snow mountains

4. In the author's eyes, the driver of the snowblower was a(n) _____. [ ]

A. angel

B. father

C. ordinary cleaner

D. hard worker

考点:故事类阅读
题型:阅读理解

简述外加酶法破碎细胞的原理及其特点。

题型:阅读理解

2013年11月召开的党的十八届三中全会做出的放开“单独二胎”政策(夫妻双方有一方是独生子女的可生育两胎)引起高度关注。下列有关放开“单独二胎”政策的叙述,正确的是

A.不必再坚持计划生育的基本国策

B.每对夫妇都可生育两个以上孩子

C.我国人口处于负增长,老龄化严重

D.逐步调整完善生育政策,促进人口长期均衡发展

题型:阅读理解

[说明]
某学校的教学系统描述如下:
学生信息包括:学号(Sno)、姓名(Sname)、性别(Ssex)、年龄(Sage)、入学年份(Syear)、主修专业(Smajor),其中学号是入学时唯一编定的。
教师信息包括:教工号(Tno)、姓名(Tname)、性别(Tsex)、年龄(Tage)、职称(Title),其中教工号是唯一编定的。
课程信息包括:课程号(Cno)、课程名称(Cname)、学时(Cpeiiod)、学分(Ccredit),其中课程号是唯一编定的。
每个专业每个年级只有一个班级,这样班级就可用入学年份标识。
每位教师只教授特定的一门的课程,每门课程可以有多个教师教授,各位老师的上课地点及上课时间有所不同。注意:一门课程至少有一位教师教授,否则这门课程就视为不存在。
每位学生可以同时选修多门不同的课程,一门课程至少要有10位学生选修,否则就取消这门课程的开设。注意:选修课程时要指定任课教师,不能重复选修同一门课程。课程结束后,任课教师给选修该课程的学生一个成绩(Grade)。注意:教师不能给没有选修他所教授课程的学生成绩,即使选修了其他教师教授的同一门课也不行。
图2-1是经分析得到的E-R图。
[图2-1]


1.根据题意,给出联系的属性。实体间的联系有“一对一”、“一对多”和“多对多”,指出各联系分别属于哪一种。

题型:阅读理解

直接观察有什么优点?

题型:阅读理解

在地下防水混凝土结构中,施工缝是防水薄弱部位之一。

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