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问题 多项选择题

用乙醇提取生物碱可提出

A．游离生物碱

B．生物碱无机酸盐

C．生物碱有机酸盐

D．两性生物碱

E．季铵型生物碱

答案

参考答案：A,B,C,D,E

阅读理解
阅读理解。
                                                               House Rules
1. Please clean up before leaving.
2. Showers to be taken before 11 p. m.
3. No staying out after 10 p. m. unless allowed by me.
4. You may have incoming calls on my mobile phone but no out going calls.
5. Bed time is 11 p. m.
6. Dinner is at 7 p. m. unless noticed (通知). (If you don't have dinner, you must let us know
    before 6 p. m. )
7. Keep noise to the least.
8. No smoking in the bedroom. 
The address you are staying at is:
      112 Kendal Way
      Chesterton
      Cambridge 		     Contact numbers:
     My mobile number is
     07870 347980
  
1. These rules are made for               .
[ ]
A. salesmen
B. guides
C. people who do the cleaning
D. people who will live with a family
2. Which of the following is NOT mentioned in the rules?
[ ]
A. The name of the host.
B. The time to go to bed.
C. Something you can't do.
D. The address you will be staying at.
3. You can do the following except                .
[ ]
A. taking showers at 9 p. m.
B. smoking out of the bedroom
C. telling the host at 7 p. m. if you don't have dinner
D. using the host's mobile phone to receive phone calls
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单项选择题

甲公司的某项固定资产原价为l 000万元，采用年限平均法计提折旧．使用寿命为 lu年，预计净残值为0，在第5年年初企业对该项固定资产进行更新改造，并对某一主要部件进行更换，发生支出合计500万元．符合准则规定的固定资产确认条件，被更换的部件的原价为300万元。甲公司更换主要部件后的固定资产原价为( )万元。

A．1100

B．920

C．800

D．700
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