甲发现一头牛在自家田里吃麦苗，便将此牛牵回进行喂养，并粘贴告示请失主来认领，过了10

Many children think mobile phones are cool. They come in fun colors and let you talk with friends anytime and anywhere.

In the U.S., more than 90 million people use mobile phones. Many of these people are children. For children, mobile phones are more than phone calls. They are fashionable.

Most mobile phone users don’t think about the health problems caused(引起) by mobile phones. Some scientists say that mobile phones give off radiation(辐射) that might be bad for the users. One newest study shows that mobile phone radiation might raise(增加) a person’s chance of getting some kinds of cancer(癌症). Other scientists say mobile phones don’t’ threaten people’s health. They say that they have not found any link(联系) between phone use and cancer.

Scientists say that people can protect (保护) themselves from mobile phone radiation. One way is to use a headset(耳机). Or people can make shorter call.

小题1:Many children like mobile phones because they think mobile phones are _________.

A．cool

B．small

C．cheap

D．their toys小题2:Many of the mobile phone users in the U.S. are ___________.

A．girls

B．boys

C．scientists

D．children小题3:Some scientists think mobile phones aren’t _________ for users health. They causes some kinds of cancer

A．bad

B．good

C．wrong

D．helpful小题4:The underlined word “threaten” in the passage means ____________.

A．威胁.

B．担心

C．治疗

D．证实小题5:What should people do to protect themselves from mobile phone radiation?

A．Make longer calls

B．Use a headset

C．Make shorter calls

D．Both B and C

某同学在探究“物体所受重力大小与物体质量的关系”时的记录如下表所示：

（1）请完成以上表格并在下图中，以质量为横坐标，重力为纵坐标，根据表格中的数据，画出重力与质量之间关系的图线。

（2）分析表中实验数据和图像，得出的结论是：_________________________________________

（3）该小组的同学在继续探究“影响物体重力大小的因素”实验中，进行了“物体重力的大小跟物体形状是否有关”的探究实验，他们用橡皮泥为实验对象，用小刀将橡皮泥雕刻成各种形状进行实验，实验数据如下表所示：

分析实验数据得出的实验结论是：物体重力的大小与物体的形状有关。他们的结论正确吗?请你对此实验过程及实验结论做出评价。

评价：_________________________________________________。

土壤的物理吸收作用主要受胶体______的影响。

A．表面能

B．带电性

C．离子交换

D．凝聚

患新生儿溶血病的早产儿，体重1500g，需采用换血疗法的血清胆红素临界值是（）

A.>342μmol/L（20mg/dl）

B.>290μmol/L（17mg/dl）

C.>256μmol/L（15mg/dl）

D.>222μmol/L（13mg/dl）

E.>205μmol/L（12mg/dl）

（）属于行为科学理论的研究成果。

A.强化理论

B.精细化劳动分工

C.需求层次理论

D.时间与动作研究

E.团队动力学理论