某种烷烃11克完全燃烧,需标准状况下氧气28升,这种烷烃的化学式是[ ]
A.CH4
B.C2H6
C.C3H8
D.C4H10
答案:C
阅读理解。
Hello, nice to meet you. I am Jack. I am a student. I am in Class 5, Grade 4. There are forty-five
students in my class. Now, it's 10:00. It's time for English class. I like our English teacher. His office
is on the first floor. He is a young man. He wears blue sweater and jeans today. I like blue and I have
a blue sweater, too. What colour do you like?
1. Jack is a _____.
A. student
B. teacher
C. English teacher
2. What time is it for English class?
A. Nine o'clock
B. Ten o'clock
C. Eight o'clock
3. How many students are there in Jack's class?
A. 50
B. 55
C. 45
4. Jack's English teacher is a _____.
A. young man
B. young girl
C. young woman
5. What colour does Jack like?
A. Red
B. White
C. Blue
在编制预算定额时,正确确定预算定额计量单位的方法是按( )确定。
A.施工工序B.工作过程C.分项、分部工程和结构构件的形体特征及其变化D.工程量大小