若一个正方形的面积为4a2+12ab+9b2（a＞0，b＞0），则这个正方形的边

挫伤会出现何种临床表现（）

A.损伤后出现少尿或无尿

B.损伤处有广泛的组织破坏

C.二者均有

D.二者均无

E.以上均错误

根据句意及首字母或汉语提示完成句子。

1. In China, people usually s_____ hands when they meet for the first time.

2. The students are s_____ to wear their uniforms at school, aren't they?

3. You had better not k_____ the baby's mouth because she is ill.

4. —W_____ spoon is this?

    —It's Li Lei's.

5. —May I use the k_____ to cut the apple?    

    —Yes, please.

6. —Could you please eat some delicious food again?    

    —No, I am f_____ now.

7. Sometimes we can use some punctuation (标点) m_____ to express our emotions.

8. We should often _____ (实验)with our own ideas, so that we can improve our skills.

9. It's very important to use e-mail at the _____ (合适的) time.

10. I'm _____ (逐渐地) getting used to things.

由开普勒行星运动定律知，行星绕太阳运动的椭圆轨道的半长轴R的三次方与周期T的平方的比值为常量，设=k，下列说法正确的是(  )

A．公式=k只适用于围绕太阳运行的行星

B．围绕同一星球运行的行星或卫星，k值不相等

C．k值与被环绕星球的质量和行星或卫星的质量都有关系

D．k值仅由被环绕星球的质量决定

招标程序有：①成立招标组织。②发布招标公告。③编制招标文件和标底。④组织投标单位现场勘查，并对招标文件答疑。⑤对投标单位进行资格审查。⑥发售招标文件。则下列招标程序排序正确的是()。

A.①③②⑥⑤④

B.①③②⑤⑥④

C.①⑤⑥②③④

D.①②③⑤④⑥

承压型高强度螺栓的抗拉承载力与（）。

A.作用拉力大小有关

B.与预拉力大小有关

C.与连接件表面处理情况有关

D.与A、B和C都无关