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干筛法适用于水泥混凝土用的集料筛分试验,水筛法适用于沥青混合料用的集料筛分。
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混凝土用砂按细度模数分为粗、中、细三级,细度模数越大表示砂子越粗。
There are ten sentences in this section. Beneath each sentence there are four words or phrases marked A, B, C and D. Choose one word or phrase that best completes the sentences.1. His guilty expression ________ my suspicion.A. confronted B. confirmed C. convened D. concluded2. Salisbury sent him on a diplomatic _________ to North America.A. project B. plan C. program D. mission3. Experts are trying to _________ ways to clean up the huge slick.A. devise B. derive C. think D. measure4. They have _________ a number of conditions to the agreement.A. regulated B. attached C. attacked D. formulated5. Buck never allowed himself to be bullied into doing anything that went against his _________.A. rules B. principles C. standard D. instinct6. As autumn _________, the plants and colours in the garden changed.A. approached B. reached C. accessed D. stayed7. The hour-long programme will be updated each week and _________ highlights from recent games.A. characteristic B. cover C. underscore D. feature8. The agreement would allow the rebels to be ________ into a new national police force.A. put B. absorbed C. joined D. incorporated9. I usually do a rough __________ before I start on a painting.A. portrait B. image C. picture D. sketch10. It is sometimes easier to illustrate an abstract concept by _______ with something concrete.A. analogy B. analysis C. comparison D. contrast
科学可视化最初被称为( )
等值线是制图对象某一数量指标值相等的各点连成的平滑曲线,由地图上标出的表示制图对象数量的各点,采用( )
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