读“人口增长模式随时间变化图”，以及部分国家人口出生率、死亡率和自然增长率表，回

甲公司2013年3月份计划成本和2013年3月份实际发生的材料、工时消耗和材料单价、每小时工资成本如下表所示：要求：根据上述资料，不考虑其他因素，分析回答下列第（1）-（6）小题。

每小时工资成本变动对单位成本的影响为（）元。

A.-160

B.-120

C.130

D.160

下列属于筛查性测试的是（）

A.CessellScale-R

B.WPPSI

C.WISC-R

D.DDST

E.NBNA

用适当的介词或副词填空。

1. I am going ____ a journey ____ my new bike, but she'll go ____ bus.

2. Today my grandpa wants to go shopping ____ foot instead ____ by bus.

3. Towards evening, we put ____ our tent ____ the foot of the mountain.

4. What's the difference ____ temperature ____ the day and the night?

5. His parents are very strict ____ him ____ his studies.

6. ____ her childhood, she has dreamed ____ having a chance to climb the Great Wall.

7. Of course, my sister hadn't looked ____ a map; she didn't care ____ details.

8. ____ this point they had to change their heavy clothes ____ light ones.

女性，16岁，上感后发生心悸、胸闷、气短，胸部X线片示心脏扩大、肺淤血，诊断病毒性心肌炎、心功能不全，缓解心功能不全的首选药物是（）

A.利尿剂

B.洋地黄

C.血管扩张剂

D.激素

E.钙拮抗剂

脂肪的主要功能有哪些？