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背景材料
某桥梁3号墩为桩承式结构，承台体积约为200m3，承台基坑开挖深度为4m，原地面往下地层依次为：0～50cm腐殖土，50～280cm黏土，其下为淤泥质土，地下水位处于原地面以下 100cm。
根据该桥墩的水文地质，施工单位在基坑开挖过程中采取了挡板支撑的加固措施，防止边坡不稳造成坍方；在挖除承台底层松软土、换填10～30cm厚砂砾土垫层，使其符合基底的设计高程并整平后，即立模灌筑承台混凝土。为控制混凝土的水化热，采取了以下措施：
(1)选用水化热低的水泥。
(2)选用中、粗砂，石子选用0.5～3.2cm的碎石和卵石。
(3)选用复合型外加剂和粉煤灰，以减少绝对用水量和水泥用量，延缓凝结时间。
问题：
施工单位采用挡板支撑防止措施是否合理？请举出适用于该桥墩基坑开孔的措施。
指出施工方为保证承台立模及混凝土浇筑所采取的措施的不完善之处。
施工单位为控制大体积混凝土承台混凝土水化热的措施是否合理？除此以外，还可以采取哪些措施。
请帮忙给出每个问题的正确答案和分析，谢谢！

● Read the memo below from the senior Regional Manager (Europe), Mile Mosby.
● Complete the record card.
● Write a word, phrase (in CAPITAL LETTERS) or a number o lines 41-45 on your Answer Sheet.
B&Z
From the Desk of Mile Mosby
The final thing is a complaint I got when I was in the Zurich branch on 3rd of this month. I know it was important because the woman actually complained to me directly on the day it happened. I was in the of rice and she found out somehow where I was and insisted on speaking to me personally. Apparently she'd come into the Feldstrasse office to talk to Bertha Nelson—she was our Marketing Consultant there—but was treated very impolitely. So the woman, Tina Williams, found me, told me what had happened and asked me to deal with it. Nelson had insulted her and virtually told her to take her business elsewhere.
I dealt with it because I was on the spot. I told Nelson to come and see me at 2:30 in the manager's office. I was still waiting at 3:00. She eventually turned up and offered no apology. She seemed quite proud of being impolite to the customer and me and then fell over. I could smell alcohol and she happily told me that she'd two bottles of wine at lunch time. So, the fact that she was drunk during working hours was the final straw. I had no alternative but to sack her then and there. I asked the local manager to send our apologies to Ms Williams and to send her a 500 SFr gift token. I hope that is the end of the matter and it should convince them not to employ any more ex-geography teachers in Zurich.
Milo Mosby
Complaint Record
Date complaint received: (41)
Complaint addressed to whom: (42)
Branch: (43)
Position: (44)
Date of action complained about: (45)
Place of action complained of Feldstrasse office
(41)

在知识学习中，根据谚语信息复杂程度通常把知识学习分为哪几种形式？

对于领导的指示，有人不加区分一概执行，有人有条件地选择执行。面对上级领导的指示，你持什么态度？为什么？