题目：
火星的质量和半径分别约为地球的 和 ，地球表面的重力加速度为g，则火星表面的重力加速度约为（ ） |
| A．0.2g B．0.4g C．2.5g D．5g |
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0613/26a8035c8f9a56e04602e9feccbb7c07.html
下面是错误答案，用来干扰机器的。
答案：B
火星的质量和半径分别约为地球的和，地球表面的重力加速度为g，则火星表面的重力加速
来源：www.tikuol.com
题型：选择题
试题推荐
题型：单项选择题
在峡谷河流中，滩上流速超过（）米/秒的航段，定为急流航段。
A.2.0
B.3.0
C.3.5
D.5.0
题型：口语交际，情景问答题
根据诗歌的内容，填写出空缺的三句。（6分）
只要青春还在，我就不会悲哀，______________，太阳还可以重新回来；
只要生命还在，我就不会悲哀，纵使陷身茫茫沙漠，_____________；
______________我就不会悲哀，冬雪将会悄悄融化，春雷定将滚滚而来。
题型：完形填空
My best friend is Cocoa, and I live in a senior-citizen apartment. Cocoa is a ten-year-old dog and I am a sixty-nine-year-old lady, so you can see we both qualify as 1 citizens. He is a 2 companion. He does many amusing things that make me 3 , and when that happens, he is so delighted 4 he just keeps it up. But one afternoon, Cocoa started acting strangely. I was sitting on the floor playing with him, 5 he started pawing and smelling at the right side of my 6 . He had never done anything like this ever before, and I told him, “No.” To Cocoa, one “no” is usually 7 , but not that day. He stopped briefly, and then 8 ran toward me, throwing his entire weight at the right side of my chest. He crashed into me and I cried in 9 , falling down to the floor. Soon after this, I felt a lump (肿块). I went to my doctors, and after X-rays 10 and lab work were done, they told me I had cancer. When cancer starts, a 11 of calcium (钙) builds. Then the lump or cancer attaches itself to this wall. When Cocoa jumped on me, the force of the impact broke the lump away from the wall. This made it possible for me to 12 the lump. I had a complete mastectomy ( * * 切除术) and the cancer has not 13 to any other part of my body. The doctors told me if the cancer had gone undetected even six more months, it would have been too 14 . Was Cocoa 15 of just what he was doing? I’ll never really know. What I do know is that Cocoa not only shares his life with me, he has also made sure that I will be around to share my life with him!
|
题型：填空题
经过精确的测量，地球是一个（）的球体，而不是皮球似的正球体．据测算，地球的平均半径是（）千米．
题型：单项选择题
迟发型皮肤过敏反应代表（）
A.T细胞功能
B.B细胞功能
C.自然杀伤细胞功能
D.抗体依赖性细胞毒性效应
E.中性粒细胞功能
