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在复习测量知识时，某同学测得“九年级下科学教科书”的一些物理量，如表所示：

物理量长/厘米宽/厘米高/厘米质量/克
测量值26.018.50.6260
乙同学把一本掉在地上的“九年级下科学教科书”捡起后，将其平放在离地70厘米高的桌子上（如图）．请根据以上信息计算：

（1）乙同学把书捡起来平放在桌面上的过程中对书本所做的功是多少焦？

（2）教科书平放在桌面上，此时教科书对桌面的压强是多少帕？（计算结果保留整数）

（3）乙同学利用表上数据，又进行了新的计算，部分过程如下：…=

260克
26.0厘米×18.5厘米×0.6厘米
=…则该同学计算得物理量是教科书的______．

答案

（1）教科书的重力：

G=mg=0.26kg×9.8N/kg=2.548N，

W=Gh=2.548N×0.7m=1.7836J；

（2）∵教科书平放在桌面上，

∴S=0.26m×0.185m=0.0481m2，

F=G=2.548N，

此时教科书对桌面的压强：

p=

F
S
=
2.548N
0.0481m2
≈53Pa；

（3）教科书的密度：

ρ=

m
V
=
260g
26.0cm×18.5cm×0.6cm
≈0.9g/cm3，

所以该同学计算得物理量是教科书的密度．

答：（1）乙同学把书捡起来平放在桌面上的过程中对书本所做的功是1.7836J；

（2）教科书平放在桌面上，此时教科书对桌面的压强是53Pa；

（3）该同学计算得物理量是教科书的密度．

配伍题 B1型题

基础体温双相，但高温相上升缓慢且持续时间短，此时子宫内膜改变最可能是（）
女性，23岁，平素月经规律，6/28，因停经40天就诊，查尿妊娠试验阳性，此时子宫内膜的改变是（）
女性，27岁，结婚2年未避孕，G0P0，以往月经稀发，有多毛、肥胖等症状，现因停经3个月就诊，B超示双侧卵巢增大，两侧卵巢内各有10个以上直径为2～9mm无回声区，呈车轮状排列，余未见异常。基础体温单相，此时子宫内膜改变最可能是（）
某患者，女性，32岁，G1P1，月经周期正常，因经期延长、出血量多就诊，测基础体温双相，但下降缓慢．妇科检查未见异常，子宫及双附件B超未见异常。于其月经第6日行诊断性刮宫，此时子宫内膜改变最可能是（）

A.增殖期

B.分泌期

C.分泌期分泌功能不足

D.混合型子宫内膜

E.呈蜕膜样改变
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阅读理解

Narcissus was a beautiful looking boy. He had long, flowing, blond hair, beautiful, bright, blue eyes and even, white teeth. Many young ladies fell in love with him including the nymph（女神）: Echo.

Nymphs were lively spirits who lived near streams and lakes and protected trees in the forest. Echo had upset the Queen of the Gods; Hera. As a punishment Hera made Echo unable to speak except to repeat the last three words of the person she was talking to.

Poor Echo fell in love with Narcissus but could never tell him how she felt. Narcissus teased her and she ran away with tears pouring down her face. Aphrodite, the goddess of love saw what happened and decided to punish Narcissus. As he came to a pool of water Narcissus saw his reflection (影子)and fell in love with the vision he saw. It was of course his own reflection.

Poor Narcissus watched his own reflection, every time he tried to touch the face of the vision he loved it broke up on the shimmering surface of the water. Narcissus stopped eating, lost his beautiful looks and desired to get his love. In the end he anguished gradually and died.

Aphrodite took pity on him and made a flower grow in his place on the bank of the lake. Narcissus flowers (水仙花) can be found to this day growing wherever you can find water and trees.  

小题1:Echo fell in love with Narcissus because_________.

A．Narcissus was good-looking.

B．Echo was a lively spirit

C．Narcissus loved her, too.

D．Echo took pity on Narcissus小题2: Why did Aphrodite, the goddess of love, punish Narcissus?

A．Aphrodite envied Echo because she loved Narcissus

B．She thought Narcissus didn’t respect and made Echo sad.

C．Narcissus fell in love with the vision, not Echo.

D．Echo was trapped in love and didn’t protect trees in the forest any longer.小题3:What does the underlined word “anguished” in the fourth paragraph mean?

A．become increasingly thin and weak

B．become very hungry

C．become very fat

D．become out of mind小题4:What is the main purpose of writing the passage?

A．To tell people a sad love story

B．To tell people how Narcissus flowers came

C．To tell the true meaning of beauty and ugliness

D．To tell people not affect others’ love
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