条件致病菌指的是（） A.正常菌群中的细菌 B.已知的病原菌 C.带菌者排出的病原菌

简述什么是容积调速回路？

下列物质中，既能与水反应，又能与酸反应的是（　　）

A．二氧化碳

B．碳酸钙

C．生石灰

D．氧化铁

读图，回答问题

（1）图中 A 为______岛，B为______煤矿．

（2）在自然资源方面，两国的主要区别是：

日本______．

俄罗斯______．

（3）两国的工业分布都不平衡，日本的工业集中分布在______地带，俄罗斯的工业主要分布在______．

（4）俄罗斯太平洋沿岸的重要港口是______，北冰洋沿岸的冬季不冻港是______，它冬季不冻的原因是______．

B

Our eating habits(习惯) are very important for good health and a strong body. There are times when most of us would rather eat sweets and ice-cream than meat and rice. Sweets and ice-cream are not bad if we eat them at the end of a meal. If we eat them before a meal, they may take away our appetite(食欲). It is important for us to eat our meals at the same time each day. When we feel hungry, it is a sign that our body needs food. When we feel angry or excited, we may not want to eat. A long time ago, in England, some judges(法官) used to decide whether a man was telling the truth by giving him some dry bread. If the man could not eat the bread, it showed that he was telling lies. Although this seems very strange and rather foolish, it is indeed a very good way of finding out the fact. A man who is worrying about something has difficulty in eating anything dry. Because he is worrying, he loses his appetite and does not want to eat.

61. We must have good eating habits because ____.

A. we want to eat more                B. we want to enjoy our meals

C. we want to be healthy and strong      D．we want to have a good appetite.

62. It is good to eat sweets and ice-cream ____.

A. when we are hungry . B. when we want to  C. after the meal D. before the meal

63. We'd better have our meals ____.

A. at the same time each day         B. when our work is over

C. when the meal is still hot          D. when every one of the family is home

64. According to the judges in England, if a man tells a lie, he____.

A. eats dry bread easily          B. eats dry bread with difficulty

C. eats a lot of dry bread         D. drinks milk with difficulty

65. A man who is angry ____.

A. has a better appetite          B. likes to tell lies

C. likes to eat ice-cream         D. has a poor appetite

教育信息化的过程是（）的引入过程.