添加MgF2能()电解质的表面张力,促进炭渣分离。A、增大 B、减小 C、不改变 D

题型:单项选择题

问题:

添加MgF2能()电解质的表面张力,促进炭渣分离。

A、增大

B、减小

C、不改变

D、去消

考点:铝电解工考试铝电解工考试题库
题型:单项选择题

Everyone has got two personalities(性格)-the one that is shown to the world and the other that is secret and real. You don’t show your secret personality when you’re awake because you can control your behavior, but when you’re asleep, your sleeping position shows the real you. In a normal night, of course, people frequently change their positions. The important position is the one that you go to sleep in.

If you go to sleep on your back, you’re a very open person. You normally trust people and you are easily influenced by fashion or new ideas. You don’t like to displease people. So you never express your real feelings. You’re quite shy and you aren’t quite sure of yourself.

If you sleep on your stomach, you are a rather secretive person. You worry a lot and you’re always easily upset. You always stick to your own opinions or judgment, but you don’t raise your hopes too much. You usually live for today not tomorrow. This means that you enjoy having a good time.

If you sleep curled up(蜷缩), you are probably a very nervous person. You have a low opinion of yourself and so you’re often defensive. You’re shy and you don’t normally like meeting people. You prefer to be on your own. You’re easily hurt.

If you sleep on your side, you have usually got a well—balanced(平衡的) personality. You know your strengths and weakness. You’re usually careful. You believe in yourself. You sometimes feel anxious, but you don’t often get sad. You always say what you think even if it makes people rather angry

小题1:You may find the passage in       .

A. a science magazine            B A guide book

C. a sports newspaper            D. a story book

小题2:When does the sleeping position best show your secret personality?

A.In the daytime

B.At the beginning of sleep

C.At night

D.During the deep sleep小题3:Tina hardly tells her secrets to her friends. She probably goes to sleep       .

A.on curled up

B.on her stomach

C.on her back

D.on her side小题4:What does the word “defensive” mean in the passage?

A.易怒的

B.攻击性的

C.外向的

D.有戒心的小题5:What does the passage tell us?

Sleeping on your side is the best way of sleeping

Changing positions will cause sleeping problems.

Sleeping positions show people’s secret personalities.

Enough sleep makes people look better and healthier.

题型:单项选择题

颈内动脉系统短暂脑缺血发作最常见的症状是().

A.对侧上肢或下肢的发作性瘫痪

B.对侧偏身感觉障碍

C.失语

D.同侧单眼失明

E.对侧上肢或下肢共济失调

题型:单项选择题

一个IP地址包含网络地址与()。

A.广播地址

B.多址地址

C.主机地址

D.子网掩码

题型:单项选择题

急性白血病确诊的指标包括()。

A.外周血有大量白血病细胞,骨髓内原始细胞>30%

B.胸骨压痛

C.贫血、发热、出血或其他部位浸润症状

D.肝、脾、淋巴结肿大

E.以上均是

题型:单项选择题

某研究人员开展多环芳烃危险度评价的工作。其中一个步骤是确定多环芳烃类化合物进入人体后是否对机体产生肿瘤诱发等有害效应。这属于()

A.暴露评价

B.剂量一反应评定

C.危险度特征分析

D.危险度管理

E.危害鉴定

更多题库