心动周期中心室内压下降速度最快的时相是（） A．等容收缩期 B．快速射血期 C．减慢

患儿9个月，右睾丸未下降阴囊内，查右阴囊空虚没触及睾丸，左侧发育正常。该患儿采取正确治疗是( )

A．右隐睾牵引
B．右睾丸切除
C．药物绒毛膜促性腺激素治疗
D．等待到1岁仍不下降用绒毛膜促性腺激素治疗
E．睾酮治疗

下列属于人工合成甜味剂的是（）

A.蔗糖

B.果糖

C.葡萄糖

D.糖精

E.麦芽糖

阅读理解。

阅读下面短文，用英语简要回答文后所给的5个问题。

     I remember a time I went shopping on my first visit to Macau. Coming from cold and cloudy England, I

was prepared for the sun and dressed in a T-shirt and a short skirt. Not having much chance to enjoy the sun

in the UK and having naturally fair skin, my legs are very white. In the UK this is not a fashionable (时尚的)

look at all. Most women spend every sunny day out in the sun trying to get darker skin. The darker the skin,

the better the look.

     As I walked around one shop, two shop assistants didn't take their eyes off me the whole time, talking

quietly in Chinese. I began to feel uncomfortable and asked my friend if we could leave. After we left the shop,

she asked me what was wrong. I was embarrassed that they were talking about my white skin. My friend

laughed."They weren't laughing at you. They were saying how nice your legs are. Many Chinese women want

to have white skin like yours. In fact, there are many beauty products in the shops to make skin whiter and a

lot of money is spent on them."

     It just goes to show that we always think what others have is better. The grass is always greener on the

other side. If the women of the West and East thought the same way, Western women wouldn't spend so

much money on cream that makes skin darker and women from the East wouldn't need to use cream that

makes skin whiter.

1. Where did the story happen?

____________________________________________________________________

2. What kind of skin do most British women prefer to have?

____________________________________________________________________

3. Why did the writer think the shop assistants were laughing at her?

____________________________________________________________________

4. What were the shop assistants talking about?

____________________________________________________________________

5. What does the underlined sentence "The grass is always greener on the other side" mean?

____________________________________________________________________

短路电流的计算结果主要用于( )。

A．电气主接线比选；

B．选择电器和导体；

C．确定中性点接地方式；

D．电气设备布置。

采用不通过血脑屏障显像剂的脑静态显像中脑瘤阳性率与下列关系是（）

A.与病理性质有关、与部位和大小无关

B.与部位有关、与病理性质大小无关

C.与病灶大小有关、与病理性质和部位无关

D.与病理性质、大小、部位均有关

E.与病理性质、大小、部位均无关