问题
判断题
判断下列句子与图意是否相符,相符的在括号内打“√”,否则打“×”。 |
( ) 1. It's 6:00. I get up. | ![]() |
( ) 2. I do my homework at 8:00. | ![]() |
( ) 3. I go to bed at 9:00. | ![]() |
答案
1. × 2. √ 3. √
判断下列句子与图意是否相符,相符的在括号内打“√”,否则打“×”。 |
( ) 1. It's 6:00. I get up. | ![]() |
( ) 2. I do my homework at 8:00. | ![]() |
( ) 3. I go to bed at 9:00. | ![]() |
1. × 2. √ 3. √
在1.013×105Pa下,测得某些烷烃的沸点如下表.经分析下列选项正确的是( )
物 质 名 称 | 沸点(℃) |
正丁烷CH3(CH2)2CH3 | -0.5 |
正戊烷CH3(CH2)3CH3 | 36.0 |
异戊烷CH3CH2CHCH3 | CH3 | 27.8 |
CH3 | 新戊烷CH3-C-CH3 | CH3 | 9.5 |
正己烷CH3(CH2)4CH3 | 69.0 |
A.在标准状况下,新戊烷是气体
B.在1.013×105Pa,20℃时,C5H12都是液体
C.烷烃随碳原子数增加,沸点降低
D.C5H12随支链增加,沸点降低