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混凝土材料的强度容重比一般较低,随着桥梁跨度的增加,为减少桥梁结构的自重,混凝土逐渐向（）方向发展
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第2题
该组试块的混凝土强度代表值为（）。
某市政桥梁工程承台采用C25混凝土，属大体积混凝土，按规定频率留置试块1组。混凝土试块试压后，某组3个试块的强度分别为26.5MPa、30.5MPa、35.2MPa，施工后早期出现裂缝。该组试块的混凝土强度代表值为（）。A.30.73MPaB.26.5MPaC.30.5MPaD.35.2mPa
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第5题
国内某远洋渔业企业向美国购进国内性能不能满足需要的柴油船用发动机2台,成交价格合计为CIF境内目的地口岸680,000.00美元。经批准该发动机进口关税税率按1%计征。已知适用中国银行的外汇折算价为1美元=人民币6.5718元,计算应征进口关税
第10题
In this part you are required to write an essay about the ways of finding information. You
In this part you are required to write an essay about the ways of finding information. You should write at least 120 words and base your composition on the outline below. 1. There are different ways of finding information. 2. Which way（） do you prefer And why
第11题
Directions: In this section, you are required to write an essay with the suggested title:D
irections: In this section, you are required to write an essay with the suggested title: People and Science. Your composition should be based on the Outline below and should start with the given opening sentence: When science is mentioned... Outline: （） its influence on people You should write 160-200 words on ANSWER SHEET 2.
第12题
You’re required to compose an essay titled “Goals” with expository means of “Classification” Clues: 1) 目标的分类 （） ; 2) 各个类别的特点和细节
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