单代号搭接网络计划属于( )网络计划。A．可变型 B．随机 C．固定型 D．肯定型

阅读理解。

     Mr. Brown teaches English in a middle school. He's a good teacher and is popular among his students.

     Mr. Brown has two three-year-old sons. They're twin (双胞胎的) brothers. Mr. Brown calls them Ben

and Tom. They like vegetables, fruit and milk. They also like to take a walk with their parents and their dog,

Pick. They're very healthy and clever. Everyone likes them.

      Jim and Alex are Mr. Brown's students. They often go to see the twins and play with them. Sometimes

they bring some fruit to Ben and Tom.

     One Saturday, Jim and Alex went to Mr. Brown's house. When the twins saw them, they were very happy,

and they began to play.

     Then Alex said,"Look,Tom and Ben! Apples! Well, I have a question. If one of you can answer right, I will

give him one." The twins listened to Alex carefully.

     "I have two apples. If I eat one now, how many apples will I have, then?"

      "One." Ben said.

     Tom answered, "Two."

     "Two?" Jim said, "Why?"

      "Oh,one is inside and the other is outside."

请根据材料内容完成下列句子(每空一词)。

1. Mr. Brown is an_______ teacher in a middle school.

2. Ben and Tom are Mr. Brown's twin ____________.

3. Ben and Tom like to take walks with their parents and __________.

4. Jim and Alex went to Mr. Brown's house on __________.

5. Jim and Alex may bring some ___________ to Ben and Tom. 

男性，19岁。头晕、乏力、面色苍白1年，牙龈出血伴皮肤出血点1个月入院。化验：Hb60g/L，WBC3.2×10⁹/L，PLT30×10⁹/L，骨髓涂片确诊为再生障碍性贫血。

本例首选治疗是（）

A.雄性激素

B.氯化钴

C.泼尼松

D.脾切除

E.骨髓移植

元宵节是我国的传统节日，这一天小华全家团聚，煮汤圆以示庆贺．小华在帮妈妈煮汤圆时发现，生汤圆放入锅中由于浮力______重力而下沉，在煮的过程中，汤圆内部气体受热膨胀，浮力______（填“增大”“减小”或“不变”），致使浮力______重力而上浮．

以下不属于授信业务背景状况审查审批基本要点的是（）。

A.授信客户主体资格

B.授信业务状况

C.贷款用途

D.还款来源

燃油中产生流动穴蚀的零件是（）。

Ⅰ.出油阀；

Ⅱ.高压油管；

Ⅲ.柱塞；

Ⅳ.套筒；

Ⅴ.针阀。

A.Ⅰ＋Ⅱ＋Ⅲ

B.Ⅰ＋Ⅱ＋Ⅴ

C.Ⅱ＋Ⅲ＋Ⅳ

D.Ⅰ＋Ⅲ＋Ⅳ＋Ⅴ