在进行水平角度观测时，方向法观测法适用于观测（）方向间的水平夹角。A、一个及一个以上

阅读理解。

     In the doctor's waiting room, sick people are waiting on their chair. Bob, a school boy, is among them.

They all look very sad except (除了) Bob. He is enjoying an exciting story in a magazine. Just then the

 doctor comes in to say he is ready for the next person. Bob jumps up and runs into the doctor's room.

     "What's your trouble?" says the doctor. Before Bob could say a word, the doctor makes him lie down

 on a bed,  "Now, let me listen to your heart." Bob tries to speak, but the doctor tells him not to say

 anything. "I'll take your temperature." Bob tries to sit up, but the doctor stops him. After a moment, the

 doctor says, "Well, boy, you don't have a fever. In fact, there's nothing wrong with you."

     "I know there isn't," says Bob. "I just come here to get some medicine for my father."

1. Bob sits in the waiting room to_____.

    A. see the doctor

    B. wait for the doctor

    C. read his magazine

    D. buy some medicine

2. All the sick people look sad except Bob because _____.

    A. Bob is too young to (太小了而不会) worry about anything

    B. his father isn't very ill

    C. he is interested in the magazine

    D. there is nothing wrong with him

3. From the passage we can see that _____.

    A. the doctor is careless

    B. there is no nurse in the doctor's room

    C. the doctor is warm-heart

    D. the doctor takes Bob as (把Bob当作) a sick person

4. While looking over Bob, the doctor might think that_____.

    A. Bob is funny

    B. Bob isn't naughty (淘气的)

    C. Bob is foolish

    D. Bob is very ill

5. When Bob tells the doctor what he is here for, the doctor might think that _____.

    A. he himself is funny

    B. he himself is careless

    C. he himself is foolish

    D. he himself is naughty

A是一包白色固体，其成分是NaCl和少量难溶于水的杂质．

X中肯定存在的溶质有______，可能存在的溶质有______．

在下列组成呼吸系统的器官中，最主要的是（　　）

A．鼻腔

B．肺

C．气管

D．呼吸肌

关于高危妊娠的因素，正确的是()。

A．有妊娠合并症

B．有不良分娩史

C．盆腔肿瘤或曾有盆腔手术

D．估计胎儿体重2700g左右

E．胎盘功能减退

PE覆膜牛皮纸(卷状，宽1260mm，100g/m²)