IGS停止后，应保持开启的阀是（）。 A.主控阀 B.止回阀 C.甲板隔离阀 D.排 发布时间：2021-02-21 11:18 │ 来源：www.tikuol.com 题型：单项选择题 问题： IGS停止后，应保持开启的阀是（）。A.主控阀B.止回阀C.甲板隔离阀D.排水管线出海阀
题型：单项选择题 阅读理解。 Almost all people like flowers. Some people like flowers because of their smells, shapes, colors and so on 1 . For example, red roses mean "love" and sunflowers mean "loyalty (忠诚)". So people in more than 100 countries have chosen their own national flowers which say something about their countries' spirit(精神). In1994, China talked about choosing a national flower. 2 . They couldn't agree with each other. So it has not been decided yet. People like to buy different flowers in different seasons. Where do all the beautiful flowers in shops comefrom? Why is their price high? a. Farmers grow flowers in their fields. b. Planes or trains or buses tare the flowers to different places. c. Flower shopkeepers buy flowers from the flower markets. They look at the flowers and throw away the broken or bad ones. They cut the flowers to make them more beautiful. d. You go to buy the flowers in the shops. 3 : the farmer, the driver of the plane or train or bus, theseller in the flower market and the flower shopkeeper. So you'd better keep your flowers from far away for a long time. But how? Why not dry them? It's easy!Sand drying is a way. Dry, clean sand is one of the oldest things for drying flowers. And it's one of the cheapest. Fill a box half-way with sand. Put the flowers on top of the sand. Put the box in a warm, dry place. 4______. Take them out and they will be dry. 补全短文，然后完成第五题。A. Some people liked the peony (牡丹花) but others liked the plum blossom (梅花) B. Leave the flowers there for one to three weeksC. When you buy a flower, you're paying lots of people D. Others like flowers because they think different flowers have different meanings5. What's the best title of passage? [ ]A. Flowers' language B. Where do flowers come from? C. How to dry flowers? D. About flowers 查看答案
题型：单项选择题 将侧棱互相垂直的三棱锥称为“直角三棱锥”，三棱锥的侧面和底面分别叫直角三棱锥的“直角面和斜面”；过三棱锥顶点及斜面任两边中点的截面均称为斜面的“中面”．请仿照直角三角形以下性质：斜边的中线长等于斜边边长的一半；写出直角三棱锥相应性质：______． 查看答案
题型：单项选择题 与拉丁美洲独立革命相比，亚洲革命风暴失败的根本原因是 A．殖民者对亚洲的控制力量强大B．亚洲风暴没有启蒙思想作指导C．亚洲各国的民族解放运动处于孤立无援的境地D．亚洲的经济发展程度低 查看答案