You surely want to have good table manners. It's as simple as obeying a few rules!
The 12 Do's：
(1) As soon as you are seated, open your napkin（餐巾） and place it on your lap.
The napkin keeps on your lap (except for use) until the end of the meal. If you need to leave the table for a while,
you may leave the napkin on your chair. When the meal is finished , place your napkin neatly at the left of your plate.
(2) Sit up straight, keep your elbows (手肘) off the table, and silence your cell phone.
(3) Remember the rule: drinks on the right, foods on the left. Your water glass is on the right of the plate and your bread plate is on the left.
(4) Hold the knife and fork with the handles in the palm(手掌) of the hand, forefinger on top, and thumb underneath.
(5) Dishes are passed from left to right.
(6) Do try a little of everything on your plate.
(7) Bread should be broken off into small pieces and butter is spread on each bite as you
eatit.
(8) You may leave some food to one side of your plate if you feel you have had enough. Don't leave your plate so
clean that it looks as if you haven't eaten for days!
(9) If you are asked for the salt or pepper, pass both together.
(10) Eat soup by skimming ( 掠过 ) your spoon along the surface of the soup. Then eat it without making any noise. If the soup is hot, don't blow on it; simply wait for it to cool .
(11)When a lady arrives or leaves the table, it's polite for all gentlemen at the table to stand up.
(12)Always say 'please' and 'thank you.' Thank the host and hostess before leaving.
根据短文内容，判断句子正误，正确的写“T”,错误的写“F”。（共5小题，每小题1分满分5分）
小题1: When you finish the meal, you may leave the napkin on your chair.
小题2:It's impolite to place your elbows on the table while having dinner.
小题3: People should pass dishes from right to left at table.
小题4:If the soup you eat is hot, you may cool it by blowing on it.
小题5: This passage tells us about rules for good table manners
RCHO + R’CHO
。请设计合理方案以乙为原料（无机试剂自选）合成PBS（用合成路线流程图表示，并注明反应条件）。
（第⑴、⑵两小题每空2分，第⑶小题4分，共12分）