【单选题】下列化合物按照沸点降低顺序排列 1 )丁烷 2 )己烷 3 ) 3- 甲基戊烷 4 ) 2,3- 二甲基丁烷
【单选题】将下列化合物按沸点降低的顺序排列正确的是 ( ) 1丁烷 2己烷 3 3- 甲基戊烷 4 2- 甲基丁烷 5 2 , 3- 二甲基丁烷
【单选题】下列化合物进行S N 2反应速率由大到小的顺序为: 1 1-溴丁烷 2 2,2-二甲基-1-溴丁烷 3 2-甲基-1-溴丁烷 4 3-甲基-1-溴丁烷
【单选题】At a formal dinner, the fork should be placed __________.
A.
beside the plate when the course is served.
B.
to the right of the butter knife
C.
to the left of the butter knife.
D.
next to the soup spoon
【简答题】将下列化合物按照沸点降低的顺序排列: ( 1 )丁烷 ( 2 )己烷 ( 3 ) 3- 甲基戊烷 ( 4 ) 2- 甲基丁烷 ( 5 ) 2 , 3- 二甲基丁烷 ( 6 )环己烷
【单选题】向有“人天北柱”、“绝塞名山”之美誉的是_______。
【多选题】How should we use a fork in Thailand?
A.
You shouldn't put the fork in your mouth.
B.
You may use it to push food onto your spoon.
C.
You may use it to eat noodles.
D.
You may use it together with chopsticks.
【单选题】When you have western food, you should use knife and fork properly . The underlined part means “_________”.