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【单选题】
化合物二甲醚CH3OCH3的氢谱为【 】A.
1个峰
B.
2个峰
C.
3个峰
D.
6个峰
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反馈参考答案：
举一反三
【简答题】公式 的真值表有 (__)种真值指派;
【简答题】某储油罐中盛有密度为 960 kg/m 3 的重油,油面最高时离罐底 9.5 m ,油面上方与大气相通。在罐侧壁的下部有一直径为 760 mm 的孔,其中心距罐底 1000 mm ,孔盖用 钢制螺钉紧固,请问螺钉承受的压力()KN。(答案小数点后保留一位有效数字) (大气压力为 101.3 × 10 3 Pa )
【简答题】Dictation Listen to the third part of a short passage on the shopping attitudes of men and women and write it down word by word. hints: lunatic, triumphant
【多选题】Listen to the third part of the interview. Which two cultural aspects does Jeff mention? Please choose from the following items. Check the answers later and get the details.
A.
Entertaining
B.
Gift-giving
C.
Hierarchy
D.
Time
E.
Greetings
F.
Dress
【简答题】Listen to the third part of the conversation. Note down all the expressions for agreeing and disagreeing. Decide whether they express a) strong, b) polite or c) hesitant agreement or disagreement.
【多选题】Listen to the third part of the interview. Which two cultural aspects does Jeff mention and what does he say about them?
A.
Entertaining
B.
Gift-giving
C.
Hierarchy
D.
Time
E.
Greetings
F.
Dress
【简答题】公式【图片】的真值表有____种真值指派。
【简答题】Listen to the third part of the conversation and find the benefits of sharing photos online. Fill in the blanks with what you hear. (每空填2个单词)
【简答题】谈谈承诺服务时限快件的特点
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