阅读材料，回答下列问题（7分）。

材料一：有“中国粮仓”美誉的河南省做出决定，将采取积极有效的措施把河南建设成全国粮食核心区，力争到2020年实现粮食年产量在目前500亿千克的基础上再增加150亿千克，达到650亿千克。

材料二：河南省地图

(1)判断河南省的地势特点并说明理由。（2分）

(2)试分析河南省粮食生产的有利条件。（3分）

(3)为实现2020年粮食年产量达到650亿千克的目标，你认为河南应采取哪些措施？（2分）

信用证内容
Department: A SWTO23B01Sep/No: 004951
Message Received On: 2008-05-12/16:56:50
15.03 16:38
33062 BOCSH A CN*
33062 BOCSH A CN
XXXXX
LOCAL TIME MON MAY 12 16: 09:20 2008
TO: BANK OF CHINA, SHANGHAI
SWIFT CODE: BKCHCNBJA300
FROM: NAT’L AGRICULTURAL COOPERATIVE FED’N, SEOUL
TEST-KEY: SEE 72 FIELD(CAL FOR 116188)
MUR: 000000000482161:
MESSAGE-TYPE: 700 ISSUE OF A DOCUMENTARY CREDIT
+27: SEQUENCE OF TOTAL1/1
+40A: FORM OF DOCUMENTARY CREDIT IRREVOCABLE
+20: DOCUMENTARY CREDIT NUMBER JC968509MU00158
31C: DATE OF ISSUE 080515
+40E: APPLICABLE RULES UCP LATEST VERSION
+31D: DATE AND PLACE OF EXPIRY 080715 CHINA
+50: APPLICANT RAIN DREANS IMP. ＆ EXP. CORP.
NO. 90, MOSQUE ROAD, SEOUL, KOREA
+59: BENEFICIARY SHANGHAI WENTONG CO., LTD.
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+32B: CURRENCY CODE, AMOUNT: USD22422
+41D: AVAILABLE WITH.. BY..ANY BANK
BY NEGOTIATION
42C: DRAFTS AT.. 45 DAYS AFTER SIGHT
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43P: PARTIAL SHIPMENTS ALLOWED
43T: TRANSSHIPMENTALLOWED
44E: PORT OF LOADING/AIRPORT OF DEPARTURECHINA PORT
44F: PORT OF DISCHARGE/AIRPORT OF DESTINATION BUSAN KOREA
44C: LATEST DATE OF SHIPMENT 080708
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+TRADE TERMS: CIF BUSAN KOREA ORIGIN: CHINA
+Trolley Cases
TS503214 1104PCS
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ADDITIONAL CONDITION
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71 B: CHARGES EXCEPT OTHERWISE STATED, ALL BANKING CHARGES OUTSIDE KOREA INCLUDING REIMBURSING BANK’S CHARGES ARE FOR BENEFICIARY’ SACCOUNT
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COMM. AND DISCOUNT CHARGES FOR APPLICANT’S ACCOUNT
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LOTS BY INT’L COURIER SERVICE TO THE FOLLOWING ADDRESS:
NATIONAL AGRICULTURAL COOPERATIVE FEDERATION INTERNATIONAL
BANKING
DEPARTMENT 75, 1-KA, CHUNGJEDNG-RD, JUNG-KU,
SEOUL, KOREA
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+END OF MESSAGE +
33062 BOCSH A CN
12-MAY-2008 at 16:56 from EXTEL
(2)根据信用证内容回答下列问题：

该信用证规定的交单期限为( )。

A．最迟装运日后21天

B．提单日后21天

C．装箱单后21天