测量气体专用压力表的外壳涂色有专门规定测氨气的专用压力表外壳涂（）色。
A.黄
B.深绿
C.天蓝
D.以上都不是
参考答案：A
1. — What're these in English? — They are . 2. This is an car. It is not new. 3. — Tom, is this your T-shirt? — No, it is not . 4. — Does your friend have a small head? — No, head is big. 5. — Where does Bethune come form? — He comes from .
列式计算：
（1）0.4除1.84的商，加上两个0.5的积，和是多少？（列综合算式）
（2）一个数的2倍减去2.6与4的积，差是10，求这个数．（列方程）
