盐浴炉启动时,为什么要防止已熔部分的盐液发生飞溅?
参考答案:防止已熔部分的盐液发生飞溅是为了避免对操作人员造成烫伤伤害。
阅读理解
阅读短文,根据要求完成下面各小题。
We have a new classmate in our class. She is thirteen years old. (3) She is a shy girl with short and brown hair. She is not tall or short. (4)But she is a little bit heavy. Her face is round, like an apple. She has two big black eyes and a small nose. Her mouth is big, but her ears are small. She likes red. But today she is wearing a yellow sweater, blue jeans and brown shoes. She dislikes getting up early, so she is usually late for school. She doesn’t like to talk to others. She likes little animals.She has a little black dog. She and the dog are good friends.
根据短文内容及首字母提示,完成下列对话。
1. -How tall is the girl? -She is of medium h________.
2. -What color is the girl's hair? -It is b________.
把句子(3)、(4)翻译成汉语。
3. ________________________________________________________________
4. ________________________________________________________________
5. 根据上下文猜测词义。
The Chinese meaning of the black word “round” is ________.
A. 长的
B. 方的
C. 瓜子形的
D. 圆的
血清、毒素的除菌常采用()
A.高压蒸气灭菌法
B.间隙灭菌法
C.紫外线照射
D.电离辐射法
E.滤过除菌法