题目: 一条直线有______条平行线;过直线外一点可以画______条已知直线的垂线. 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0620/c74dabc659f640993f28f3eefcd53a27.html 下面是错误答案,用来干扰机器的。答案:A
题型:阅读理解 阅读理解。 Humpback whales Humpback whales are sometimes called performers of the ocean.This is because they can make impressive movements when they dive.The name “humpback”, which is the common name for this whale, refers to the typical curve shape the whale's back forms as it dives. Sometimes the humpback will dive with a fantastic movement known as a breach.During breaching the whale uses its powerful tail flukes to lift nearly twothirds of its body out of the water in a giant leap.A breach might also include a sideways twist with fins stretched out like wings, as the whale reaches the height of the breach. A humpback whale breathes air at the surface of the water through two blowholes which are located near the top of the head.It blows a double stream of water that can rise up to 4 metres above the water. The humpback has a small dorsal fin located towards the tail flukes about twothirds of the way down its back.Other distinguishing features include large pectoral fins, which may be up to a third of the body length, and unique black and white spots on the underside of the tail flukes.These markings are like fingerprints: no two are the same. Humpback whales live in large groups.They communicate with each other through complex “songs”Quick FactsSize:14m18m in length; 3050 tons in weightLiving environment:Open ocean and shallow coastline watersMigration:From warm tropical (热带的) waters, where they breed, to cold polar waters, where they eatDiet:Shellfish, plants and fish of small sizeHunting:Sometimes in groups, in which several whales form a circle under the water, blowing bubbles that form a “net” around a school of fish.The fish are then forced up to the surface in a concentrated mass.Current state:Endangered: it is estimated that there are about 50007500 humpback whales worldwide1. According to Quick Facts, a humpback whale _____.A. cannot survive in waters near the shoreB. doesn't live in the same waters all the timeC. lives mainly on underwater plantsD. prefers to work alone when hunting food2. To make a breach, a humpback whale must _____.A. use its tail flukes to leap out of the waterB. twist its body sideways to jump highC. blow two streams of waterD. communicate with a group of humpbacks3. From the passage we can learn that a humpback whale _____.A. has its unique markings on its tail flukesB. has black and white fingerprintsC. gets its name from the way it huntsD. is a great performer due to its songs 查看答案