题目内容

HGPRT参与的反应是

A. 嘌呤核苷酸从头合成
B. 嘧啶核苷酸从头合成
C. 嘌呤核苷酸补救合成
D. 嘧啶核苷酸补救合成
E. 嘌呤核苷酸分解代谢

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关于6-巯基嘌呤的叙述，不正确的是

A. 抑制次黄嘌呤生成IMP
B. 抑制IMP生成AMP
C. 抑制IMP生成GMP
D. 抑制腺苷生成AMP
E. 抑制鸟嘌呤生成GMP

Questions 27-31Reading Passage 3 has six paragraphs, A-F.Which paragraph contains the following informationWrite the correct letter, A-F, in boxes 27-31 on >’our answer sheet. A model for suburban development in the latter half of the 20th century（）

Questions 32-38Do the following statements agree with the information given in Reading Passage 2In boxes 32-38 on your answer sheet, write A good principle for ecological preservation is to avoid human interference.（）

Questions 14-20Complete the table below.Write NO MORE THAN TWO WORDS AND~OR A NUMBER for each answer.SAVINGS OPTIONSSavings AccountMinimum balanceInterest InformationAccessInternet AccountNoneEarn good rate from first dollor. Calculated daily and~aid monthlyVia Internet, TXT,telephone. No account or (14) feesIStairs SaverINone--but higherrates for biggerbalances3 tiers plus (15) Calculated daily and paidmonthlyUnlimited withdrawals but better to limit to once a month (16) NoneOne interest rate, calculated daily and paid on (17) Anytime—no penalty for withdrawalsINVESTMENT OPTIONSInvestment AccountMinimum depositInterest InformationAccessTerm Deposit--safe and (18) ,low risk$1,000Calculated daily and paidmonthly, quarterly, orat maturityOnly at maturity (19) —longer term butbetter returns$5,000Calculated daily andcompounded or paid outquarterlyOnly at maturityRetirement Funda certain percentage of (20) before taxDifferent levels of risk and returnAt 60 （20）处填入（）