混凝土运输应满足的要求是（）。

[判断题]平衡指运动或静止站立时保持身体稳定性的能力。

[单选题]The number of speakers of English in Shakespeare’s time is estimated (估计) to have been about five million. Today it is estimated that some 260 million people speak it as a native language, mainly in the United States, Canada, Great Britain, Ireland, South Africa, Australia and New Zealand. In addition to the standard varieties of English found in these areas, there are a great many regional and social varieties of the language as well as various levels of usage that are employed both in its spoken and written forms. In fact, it is impossible to estimate the number of people in the world who have acquired an adequate (足够的) working knowledge of English in addition to their own languages. The purpose for English learning and the situations in which such learning takes place are so varied that it is difficult to explain and still more difficult to judge what forms an adequate working knowledge for each situation. The main reason for the widespread demand for English is its present-day importance as a world language. Besides serving the indefinite needs of its native speakers, English is a language in which some of important works in science, technology, and other fields are being produced, and not always by native speakers. It is widely used for such purposes as meteorological and airport communications, international conferences, and the spread of information over the radio and television networks of many nations. It is a language of wider communication for a number of developing countries, especially former British colonies. Many of these countries have multilingual populations and need a language for internal communication in such matters as government, commerce, industry, law and education as well as for international communication and for entrance to the scientific and technological developments in the West.Which of the following statements is NOT true

[问答题]农用地水土保持耕作技术措施的主要作用是什么？根据其主要功能及作用可分为哪些类型？

[单选题]光纤三个低损耗窗口（）、1310nm、1550nm。

[单选题]下列关于银行间债券市场的组织体系的表述，不正确的是（　　）。

[单选题]磺脲类药降糖的主要作用是（　　）。

[问答题]何谓事故照明？

[多选题]世界银行的贷款主要用于的行业包括 ( )

[单选题]6号线、8号线、9号线、13号线的人工作业日安排在每周（）。

[单选题]钙对于机体具有广泛的生理作用，血清总钙<2.10mmol/L为低钙血症。低钙血症的临床表现中没有（）。

[多选题]混凝土运输应满足的要求是（）。

[单选题]运输混凝土拌合物时，运输时间应比混凝土初凝时间（）。

[单选题]运输混凝土拌合物时，运输时间应比混凝土初凝时间（）。

[单选题]运输混凝土拌合物时，运输时间应比混凝土初凝时间（）。

[单选题]混凝土应随拌随用，混凝土运输应采用泵送或混凝土运输车运送，当采用泵送时，输送管路的起始水平段长度不应小于（）。

[单选题]高温施工浇筑混凝土时，混凝土宜采用（）色涂装的混凝土搅拌运输车运输。

[单选题]预拌混凝土交货检验的试样应随机从同一运输车中抽取，混凝土试样应在卸料量的（）之间采取。

[填空题]混凝土出厂检验应在搅拌地点取样；混凝土交货检验应在交货地点取样，交货检验试样应随机从同一运输车卸料量的（）抽取。

[问答题]对混凝土运输有何要求？

[问答题]混凝土运输的要求有哪些？