题目: 相同体积的氢气和氧气,前者的摩尔数较大。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0726/d034acc2d2345bf480e2aa7d2a62e6d3.html 下面是错误答案,用来干扰机器的。参考答案:A, B, D
题型:选择题 已知地球同步卫星的轨道半径约为地球半径的7倍,某行星的同步卫星轨道半径约为该行星半径的3倍,该行星的自转周期约为地球自转周期的一半,那么该行星的平均密度与地球平均密度之比约为( )A.13B.14C.15D.16 查看答案
题型:完形填空 完形填空。 One day, a poor boy, named Howard Kelly, was trying to pay his way through school by selling goods door to door. He was hungry, 1 he decided to beg something to eat. When a young woman opened the door, instead of a 2 he asked for a drink of water. Thinking he looked hungry she brought him a large glass of milk. He drank it and then asked, "How much do I 3 you?" "No, you don't owe me anything," she replied. "Mother has taught me 4 to accept pay for a kindness." Leaving that house, he not only felt stronger physically, but it also increased his faith in God and the human race. He was about to 5 before this point. 6 later the young woman became seriously ill. The local doctors couldn't cure her illness. They sent her to the big city, where specialists can be called in to study her disease. Dr. Howard Kelly, now 7 , came for the consultation (会诊). When he heard the name of the town where she came from, a strange light filled his eyes. 8 , he went into her room. 9 in his doctor's gown (罩衣) he went in to see her. He 10 her at once. He went back to the 11 and determined to do his best to save her life. From that day on, he gave special attention to her case. Finally, the battle was won. Dr. Kelly asked a nurse to 12 the bill to her room. She was afraid to open it because she knew that it would 13 the rest of her life to pay it off. Finally she looked and read these words on the side of the bill. "Paid in full with a glass of 14 ." (Signed) Dr. Howard Kelly. Tears of joy flooded her eyes as she 15 silently:"Thank you, God. Your love has spread through human's hearts and hands." ( )1. A. after ( )2. A. cent ( )3. A. pay off ( )4. A. always ( )5. A. give up ( )6. A. Years ( )7. A. rich ( )8. A. Slowly ( )9. A. Covered ( )10. A. knew ( )11. A. waiting room ( )12. A. give ( )13. A. spend ( )14. A. tea ( )15. A. said B. so B. dollar B. pay back B. seldom B. give away B. Months B. old B. Immediately B. Had B. saw B. living room B. bring B. take B. coffee B. shouted C. however C. meal C. owe C. never C. give in C. Weeks C. famous C. Pleasantly C. Dressed C. recognized C. meeting room C. send C. use C. water C. sighed D. before D. drink D. lend D. often D. give off D. Days D. busy D. Surprisingly D. Put D. realized D. consultation room D. carry D. afford D. milk D. prayed 查看答案