31岁妇女，原发性不孕5年。子宫输卵管碘油造影提示一侧宫腔显影，附件为单侧，同侧肾脏

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They’re best friends. They are together every day. One of the friends, Jenny Siegle, is in a wheelchair (轮椅). The other, Augie, is a dog and he helps Jenny. 14-year-old Jenny is a quadriplegic (四肢瘫痪者). She cannot use her arms or legs well. Augie is not only a dog but also Jenny’s arms and legs.

How does Augie do this? In school, he picks up the pencil or notebook that Jenny drops. Jenny is also training Augie to pull off her jacket so Jenny doesn’t have to ask others for help.

At home, Augie brings her newspapers. He even helps clean Jenny’s room. When Jenny asks him to do something he can’t do, Augie goes to get her parents or sister.

At the mall, Augie wears a coat which tells everyone he is helping Jenny. After Jenny buys things, Augie carries them to the counter (柜台). He gives the cashier Jenny’s wallet and waits for the change.

The lovely and friendly dog is also a social bridge. Other kids may not know Jenny. But they come up to talk to her because they think Augie is interesting.

Augie is truly Jenny’s best friend and her bridge to the world.

Two Best Friends

如图 (a)所示，用一水平外力F推物体，使其静止在倾角为θ的光滑斜面上。逐渐增大F，物体开始做变加速运动，其加速度a随F变化的图象如图(b)所示。取g=10m/s²。根据图(b)中所提供的信息不能计算出的是

A．物体的质量

B．斜面的倾角

C．使物体静止在斜面上时水平外力F的大小

D．加速度为6 m/s²时物体的速度

有一杠杆经过调节，处于水平平衡状态，所使用的钩码重均为0.5N．如图所示，在A点悬挂两个钩码，要使杠杆水平平衡，需在B点悬挂      个钩码．取走悬挂在B点的钩码，改用弹簧测力计在C点竖直向上拉，使杠杆水平平衡，测力计的拉力为       N；如改变弹簧测力计拉力的方向，使之斜向左上方，杠杆仍然水平平衡，则测力计的读数将       （选填“变大”、“变小”或“不变”）。

L注册会计师正在对C公司的销售与收款循环以及筹资和投资循环进行审计，请运用专业判断回答下列问题．

企业对投资性房地产的计量模式一经确定，不得随意变更。成本模式转为公允价值模式的，应当作为会计估计变更处理。()

泥化夹层的主要化学成分为SiO₂：、Al₂O₃、Fe₂O₃，其次为CaO、MgO、K₂O、Na₂O等。由于碱金属离子的溶失和游离氧化物的凝聚，与母岩相比泥化夹层的化学成分含量发生了一定的变化，下列说法错误的是（）。

A.泥化后CaO的含量比母岩低

B.泥化后Al₂O₃、Fe₂O₃的含量比母岩高

C.泥化后Al₂O₃、Fe₂O₃的含量比母岩低

D.泥化后Fe₂O₃的含量比母岩低